Change [FlutterView start] to synchronousResizing property

Author: knopp

shell/platform/darwin/macos/framework/Source/FlutterEngine.mm

@@ -289,7 +289,7 @@ - (BOOL)runWithEntrypoint:(NSString*)entrypoint {
 
   [self sendUserLocales];
   [self updateDisplayConfig];
-  [self.viewController.flutterView start];
+  self.viewController.flutterView.synchronousResizing = YES;
   return YES;
 }
 
@@ -301,7 +301,7 @@ - (void)setViewController:(FlutterViewController*)controller {
     _resourceContext = nil;
   }
   if (_engine) {
-    [self.viewController.flutterView start];
+    self.viewController.flutterView.synchronousResizing = YES;
   }
 }
 
@@ -353,7 +353,7 @@ - (void)updateDisplayConfig {
   CVDisplayLinkRelease(displayLinkRef);
 }
 
-// Must be driven by FlutterView (i.e. [FlutterView start])
+// Called by [FlutterViewController viewDidReshape]
 - (void)updateWindowMetrics {
   if (!_engine) {
     return;

shell/platform/darwin/macos/framework/Source/FlutterView.h

@@ -21,6 +21,7 @@
 @interface FlutterView : NSView
 
 @property(readwrite, nonatomic, nonnull) NSOpenGLContext* openGLContext;
+@property(readwrite, nonatomic) BOOL synchronousResizing;
 
 - (nullable instancetype)initWithFrame:(NSRect)frame
                           shareContext:(nonnull NSOpenGLContext*)shareContext
@@ -37,7 +38,6 @@
 - (nullable instancetype)initWithCoder:(nonnull NSCoder*)coder NS_UNAVAILABLE;
 - (nonnull instancetype)init NS_UNAVAILABLE;
 
-- (void)start;
 - (void)present;
 - (int)getFrameBufferIdForSize:(CGSize)size;
 

shell/platform/darwin/macos/framework/Source/FlutterView.mm

@@ -13,7 +13,6 @@ @interface FlutterView () <FlutterResizeSynchronizerDelegate> {
   __weak id<FlutterViewReshapeListener> _reshapeListener;
   FlutterResizeSynchronizer* resizeSynchronizer;
   FlutterSurfaceManager* surfaceManager;
-  BOOL active;
   CALayer* contentLayer;
 }
 
@@ -80,18 +79,15 @@ - (void)present {
   [resizeSynchronizer requestCommit];
 }
 
-- (void)start {
-  active = YES;
-  [self reshaped];
-}
-
 - (void)reshaped {
-  if (active) {
+  if (self.synchronousResizing) {
     CGSize scaledSize = [self convertSizeToBacking:self.bounds.size];
     [resizeSynchronizer beginResize:scaledSize
                              notify:^{
                                [_reshapeListener viewDidReshape:self];
                              }];
+  } else {
+    [_reshapeListener viewDidReshape:self];
   }
 }