Add Systrace sections to UIImplementationProvider

Summary:
Add Systrace sections to initialization of non-Fabric UIImplementationProvider. This path is sometimes invoked during startup of Fabric so I'd like to gather more information about its impact.

Changelog: [Internal]

Reviewed By: ejanzer

Differential Revision: D24959965

fbshipit-source-id: a8555b8db284d00f97c71ca859cb2020409cb110

ReactAndroid/src/main/java/com/facebook/react/uimanager/UIImplementationProvider.java

@@ -9,6 +9,7 @@ package com.facebook.react.uimanager;
 
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.uimanager.events.EventDispatcher;
+import com.facebook.systrace.Systrace;
 import java.util.List;
 
 /** Provides UIImplementation to use in {@link UIManagerModule}. */
@@ -20,11 +21,17 @@ public class UIImplementationProvider {
       UIManagerModule.ViewManagerResolver viewManagerResolver,
       EventDispatcher eventDispatcher,
       int minTimeLeftInFrameForNonBatchedOperationMs) {
-    return new UIImplementation(
-        reactContext,
-        viewManagerResolver,
-        eventDispatcher,
-        minTimeLeftInFrameForNonBatchedOperationMs);
+    Systrace.beginSection(
+        Systrace.TRACE_TAG_REACT_JAVA_BRIDGE, "UIImplementationProvider.createUIImplementation[1]");
+    try {
+      return new UIImplementation(
+          reactContext,
+          viewManagerResolver,
+          eventDispatcher,
+          minTimeLeftInFrameForNonBatchedOperationMs);
+    } finally {
+      Systrace.endSection(Systrace.TRACE_TAG_REACT_JAVA_BRIDGE);
+    }
   }
 
   public UIImplementation createUIImplementation(
@@ -32,8 +39,17 @@ public class UIImplementationProvider {
       List<ViewManager> viewManagerList,
       EventDispatcher eventDispatcher,
       int minTimeLeftInFrameForNonBatchedOperationMs) {
-    return new UIImplementation(
-        reactContext, viewManagerList, eventDispatcher, minTimeLeftInFrameForNonBatchedOperationMs);
+    Systrace.beginSection(
+        Systrace.TRACE_TAG_REACT_JAVA_BRIDGE, "UIImplementationProvider.createUIImplementation[2]");
+    try {
+      return new UIImplementation(
+          reactContext,
+          viewManagerList,
+          eventDispatcher,
+          minTimeLeftInFrameForNonBatchedOperationMs);
+    } finally {
+      Systrace.endSection(Systrace.TRACE_TAG_REACT_JAVA_BRIDGE);
+    }
   }
 
   UIImplementation createUIImplementation(
@@ -41,10 +57,16 @@ public class UIImplementationProvider {
       ViewManagerRegistry viewManagerRegistry,
       EventDispatcher eventDispatcher,
       int minTimeLeftInFrameForNonBatchedOperationMs) {
-    return new UIImplementation(
-        reactContext,
-        viewManagerRegistry,
-        eventDispatcher,
-        minTimeLeftInFrameForNonBatchedOperationMs);
+    Systrace.beginSection(
+        Systrace.TRACE_TAG_REACT_JAVA_BRIDGE, "UIImplementationProvider.createUIImplementation[3]");
+    try {
+      return new UIImplementation(
+          reactContext,
+          viewManagerRegistry,
+          eventDispatcher,
+          minTimeLeftInFrameForNonBatchedOperationMs);
+    } finally {
+      Systrace.endSection(Systrace.TRACE_TAG_REACT_JAVA_BRIDGE);
+    }
   }
 }