android webview: Keep zoom methods synchronous

android_webview/native/aw_contents.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ANDROID_WEBVIEW_NATIVE_AW_CONTENTS_H_
 #define ANDROID_WEBVIEW_NATIVE_AW_CONTENTS_H_
 
 #include <jni.h>
 #include <list>
 #include <string>
@@ skipping 145 matching lines @@
       const base::android::JavaParamRef<jobject>& obj);
   jboolean RestoreFromOpaqueState(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jbyteArray>& state);
   void FocusFirstNode(JNIEnv* env,
                       const base::android::JavaParamRef<jobject>& obj);
   void SetBackgroundColor(JNIEnv* env,
                           const base::android::JavaParamRef<jobject>& obj,
                           jint color);
+  void SynchronizeRendererScroll(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj);
   void OnComputeScroll(JNIEnv* env,
                        const base::android::JavaParamRef<jobject>& obj,
                        jlong animation_time_millis);
   bool OnDraw(JNIEnv* env,
               const base::android::JavaParamRef<jobject>& obj,
               const base::android::JavaParamRef<jobject>& canvas,
               jboolean is_hardware_accelerated,
               jint scroll_x,
               jint scroll_y,
               jint visible_left,
@@ skipping 189 matching lines @@
   GLViewRendererManager::Key renderer_manager_key_;
 
   DISALLOW_COPY_AND_ASSIGN(AwContents);
 };
 
 bool RegisterAwContents(JNIEnv* env);
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_NATIVE_AW_CONTENTS_H_