improves naming systrace blocks

Summary:
Improves naming systrace blocks.

For example: Now the component mentioned in create-layout block matches with the component mentioned in the measure tree block

Reviewed By: astreet

Differential Revision: D32998751

fbshipit-source-id: 5c253570a13d270b496b3128f7adfa1f3d29a3c0

Author: Aditya Sharat

litho-core/src/main/java/com/facebook/litho/InternalNodeUtils.java

@@ -290,7 +290,7 @@ static LithoRenderUnit createDrawableRenderUnit(
     /* Call onBoundsDefined for the DrawableComponent */
     final boolean isTracing = ComponentsSystrace.isTracing();
     if (isTracing) {
-      ComponentsSystrace.beginSection("onBoundsDefined:" + node.getSimpleName());
+      ComponentsSystrace.beginSection("onBoundsDefined:" + component.getSimpleName());
     }
 
     try {

litho-core/src/main/java/com/facebook/litho/Layout.java

@@ -488,7 +488,8 @@ static LithoLayoutResult measure(
 
     final boolean isTracing = ComponentsSystrace.isTracing();
     if (isTracing) {
-      ComponentsSystrace.beginSection("measureTree:" + root.getSimpleName());
+      ComponentsSystrace.beginSection(
+          "measureTree:" + Preconditions.checkNotNull(root.getHeadComponent()).getSimpleName());
     }
 
     if (diff != null && root.implementsLayoutDiffing()) {

litho-core/src/main/java/com/facebook/litho/LayoutState.java

@@ -554,7 +554,7 @@ private static void collectResults(
       // If the nested tree is defined, it has been resolved during a measure call during
       // layout calculation.
       if (isTracing) {
-        ComponentsSystrace.beginSectionWithArgs("resolveNestedTree:" + node.getSimpleName())
+        ComponentsSystrace.beginSectionWithArgs("resolveNestedTree:" + component.getSimpleName())
             .arg("widthSpec", "EXACTLY " + result.getWidth())
             .arg("heightSpec", "EXACTLY " + result.getHeight())
             .arg("rootComponentId", node.getTailComponent().getId())
@@ -693,7 +693,7 @@ private static void collectResults(
 
       // Notify component about its final size.
       if (isTracing) {
-        ComponentsSystrace.beginSection("onBoundsDefined:" + node.getSimpleName());
+        ComponentsSystrace.beginSection("onBoundsDefined:" + component.getSimpleName());
       }
 
       try {

litho-core/src/main/java/com/facebook/litho/LithoYogaMeasureFunction.java

@@ -100,7 +100,7 @@ public long measure(
 
         try {
           if (isTracing) {
-            ComponentsSystrace.beginSection("resolveNestedTree:" + node.getSimpleName());
+            ComponentsSystrace.beginSection("resolveNestedTree:" + component.getSimpleName());
           }
 
           final @Nullable LithoLayoutResult nestedTree =