Add GuardedRunnable to run blocks of code on the UI thread with automatic redboxing

Summary: Like GuardedAsyncTask, et al, but for Runnables.

Reviewed By: achen1

Differential Revision: D4537287

fbshipit-source-id: 8ae60c7007843c0b7d8e5c3835d0847921fb3db5

ReactAndroid/src/main/java/com/facebook/react/bridge/GuardedRunnable.java

@@ -0,0 +1,28 @@
+// Copyright 2004-present Facebook. All Rights Reserved.
+
+package com.facebook.react.bridge;
+
+/**
+ * Abstract base for a Runnable that should have any RuntimeExceptions it throws
+ * handled by the {@link com.facebook.react.bridge.NativeModuleCallExceptionHandler} registered if
+ * the app is in dev mode.
+ */
+public abstract class GuardedRunnable implements Runnable {
+
+  private final ReactContext mReactContext;
+
+  public GuardedRunnable(ReactContext reactContext) {
+    mReactContext = reactContext;
+  }
+
+  @Override
+  public final void run() {
+    try {
+      runGuarded();
+    } catch (RuntimeException e) {
+      mReactContext.handleException(e);
+    }
+  }
+
+  public abstract void runGuarded();
+}

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

@@ -20,6 +20,7 @@ import java.util.concurrent.TimeUnit;
 import com.facebook.react.animation.Animation;
 import com.facebook.react.animation.AnimationRegistry;
 import com.facebook.react.bridge.Callback;
+import com.facebook.react.bridge.GuardedRunnable;
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.bridge.SoftAssertions;
 import com.facebook.react.bridge.ReactContext;
@@ -803,9 +804,9 @@ public class UIViewOperationQueue {
     // sure any late-arriving UI commands are executed.
     if (!mIsDispatchUIFrameCallbackEnqueued) {
       UiThreadUtil.runOnUiThread(
-          new Runnable() {
+          new GuardedRunnable(mReactApplicationContext) {
             @Override
-            public void run() {
+            public void runGuarded() {
               flushPendingBatches();
             }
           });