Turn off software rendering in iOS scenario golden tests (#55016)

Follow-up to #45093.  Remove software rendering for the golden/screenshot compare iOS scenario tests.  Throw an exception if this flag is passed into the test app.  Delete `RenderingSelectionTest`.

This did require updating some screenshots, so there are changes.

Note, these golden tests are still not running on Impeller, but I'm going to follow-up in #55012.

[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style

Author: jmagman

testing/scenario_app/bin/run_ios_tests.dart

@@ -381,7 +381,6 @@ final _skipTestsForImpeller = [
   'ScenariosUITests/PlatformViewUITests/testPlatformView',
   'ScenariosUITests/PlatformViewWithNegativeOtherBackDropFilterTests/testPlatformView',
   'ScenariosUITests/PlatformViewWithOtherBackdropFilterTests/testPlatformView',
-  'ScenariosUITests/RenderingSelectionTest/testSoftwareRendering',
   'ScenariosUITests/TwoPlatformViewClipPathTests/testPlatformView',
   'ScenariosUITests/TwoPlatformViewClipPathMultipleClipsTests/testPlatformView',
   'ScenariosUITests/TwoPlatformViewClipRectTests/testPlatformView',

testing/scenario_app/ios/Scenarios/Scenarios.xcodeproj/project.pbxproj

@@ -23,7 +23,6 @@
 		0DDEBC89258830B40065D0E8 /* SpawnEngineTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 0DDEBC88258830B40065D0E8 /* SpawnEngineTest.m */; };
 		242F37A222E636DE001E83D4 /* ../../Flutter.xcframework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 246B4E4522E3B61000073EBF /* ../../Flutter.xcframework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 		242F37A322E636DE001E83D4 /* App.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 246B4E4122E3B5F700073EBF /* App.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
-		246A6611252E693A00EAB0F3 /* RenderingSelectionTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 246A6610252E693A00EAB0F3 /* RenderingSelectionTest.m */; };
 		246B4E4222E3B5F700073EBF /* App.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 246B4E4122E3B5F700073EBF /* App.framework */; };
 		246B4E4622E3B61000073EBF /* ../../Flutter.xcframework in Frameworks */ = {isa = PBXBuildFile; fileRef = 246B4E4522E3B61000073EBF /* ../../Flutter.xcframework */; };
 		248D76CC22E388370012F0C1 /* AppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = 248D76CB22E388370012F0C1 /* AppDelegate.m */; };
@@ -197,7 +196,6 @@
 		0D8470A3240F0B1F0030B565 /* StatusBarTest.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = StatusBarTest.m; sourceTree = "<group>"; };
 		0DB781FC22EA2C0300E9B371 /* FlutterViewControllerTest.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = FlutterViewControllerTest.m; sourceTree = "<group>"; };
 		0DDEBC88258830B40065D0E8 /* SpawnEngineTest.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = SpawnEngineTest.m; sourceTree = "<group>"; };
-		246A6610252E693A00EAB0F3 /* RenderingSelectionTest.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = RenderingSelectionTest.m; sourceTree = "<group>"; };
 		246B4E4122E3B5F700073EBF /* App.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; path = App.framework; sourceTree = "<group>"; };
 		246B4E4522E3B61000073EBF /* ../../Flutter.xcframework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.xcframework; path = ../../Flutter.xcframework; sourceTree = "<group>"; };
 		248D76C722E388370012F0C1 /* Scenarios.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Scenarios.app; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -390,7 +388,6 @@
 				68A5B63323EB71D300BDBCDB /* PlatformViewGestureRecognizerTests.m */,
 				0D8470A2240F0B1F0030B565 /* StatusBarTest.h */,
 				0D8470A3240F0B1F0030B565 /* StatusBarTest.m */,
-				246A6610252E693A00EAB0F3 /* RenderingSelectionTest.m */,
 				0DDEBC88258830B40065D0E8 /* SpawnEngineTest.m */,
 				F26F15B7268B6B5500EC54D3 /* iPadGestureTests.m */,
 				686383122AC202B700E27AAD /* AppExtensionTests.m */,
@@ -729,7 +726,6 @@
 				248D76EF22E388380012F0C1 /* PlatformViewUITests.m in Sources */,
 				0D8470A4240F0B1F0030B565 /* StatusBarTest.m in Sources */,
 				F26F15B8268B6B5600EC54D3 /* iPadGestureTests.m in Sources */,
-				246A6611252E693A00EAB0F3 /* RenderingSelectionTest.m in Sources */,
 				4F06F1B32473296E000AF246 /* LocalizationInitializationTest.m in Sources */,
 				686383132AC202B700E27AAD /* AppExtensionTests.m in Sources */,
 				0DDEBC89258830B40065D0E8 /* SpawnEngineTest.m in Sources */,

testing/scenario_app/ios/Scenarios/Scenarios/AppDelegate.m

@@ -37,8 +37,13 @@ @implementation AppDelegate
 
 - (BOOL)application:(UIApplication*)application
     didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
+  NSArray<NSString*>* processArguments = NSProcessInfo.processInfo.arguments;
+  if ([processArguments containsObject:@"--enable-software-rendering"]) {
+    @throw @"--enable-software-rendering is unsupported in iOS scenario tests";
+  }
+
   self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
-  if ([[[NSProcessInfo processInfo] arguments] containsObject:@"--maskview-blocking"]) {
+  if ([processArguments containsObject:@"--maskview-blocking"]) {
     self.window.tintColor = UIColor.systemPinkColor;
   }
   NSDictionary<NSString*, NSString*>* launchArgsMap = @{
@@ -121,21 +126,21 @@ - (BOOL)application:(UIApplication*)application
   __block NSString* flutterViewControllerTestName = nil;
   [launchArgsMap
       enumerateKeysAndObjectsUsingBlock:^(NSString* argument, NSString* testName, BOOL* stop) {
-        if ([[[NSProcessInfo processInfo] arguments] containsObject:argument]) {
+        if ([processArguments containsObject:argument]) {
           flutterViewControllerTestName = testName;
           *stop = YES;
         }
       }];
   if (flutterViewControllerTestName) {
     [self setupFlutterViewControllerTest:flutterViewControllerTestName];
-  } else if ([[[NSProcessInfo processInfo] arguments] containsObject:@"--screen-before-flutter"]) {
+  } else if ([processArguments containsObject:@"--screen-before-flutter"]) {
     self.window.rootViewController = [[ScreenBeforeFlutter alloc] initWithEngineRunCompletion:nil];
   } else {
     self.window.rootViewController = [[UIViewController alloc] init];
   }
 
   [self.window makeKeyAndVisible];
-  if ([[[NSProcessInfo processInfo] arguments] containsObject:@"--with-continuous-texture"]) {
+  if ([processArguments containsObject:@"--with-continuous-texture"]) {
     [ContinuousTexture
         registerWithRegistrar:[self registrarForPlugin:@"com.constant.firing.texture"]];
   }
@@ -213,16 +218,6 @@ - (void)setupFlutterViewControllerTest:(NSString*)scenarioIdentifier {
   }
 
   self.window.rootViewController = rootViewController;
-
-  if ([[[NSProcessInfo processInfo] arguments] containsObject:@"--assert-ca-layer-type"]) {
-    if ([[[NSProcessInfo processInfo] arguments] containsObject:@"--enable-software-rendering"]) {
-      NSAssert([flutterViewController.view.layer isKindOfClass:[CALayer class]],
-               @"Expected CALayer for software rendering.");
-    } else {
-      NSAssert([flutterViewController.view.layer isKindOfClass:[CAMetalLayer class]],
-               @"Expected CAMetalLayer for non-software rendering.");
-    }
-  }
 }
 
 @end

testing/scenario_app/ios/Scenarios/ScenariosUITests/GoldenPlatformViewTests.m

@@ -31,7 +31,7 @@ - (void)setUp {
   self.continueAfterFailure = NO;
 
   self.application = [[XCUIApplication alloc] init];
-  self.application.launchArguments = @[ self.manager.launchArg, @"--enable-software-rendering" ];
+  self.application.launchArguments = @[ self.manager.launchArg ];
   [self.application launch];
 }