Hide fullscreen rotation jank

ui/android/view_android.h

 // Copyright 2013 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 UI_ANDROID_VIEW_ANDROID_H_
 #define UI_ANDROID_VIEW_ANDROID_H_
 
 #include <list>
 
 #include "base/android/jni_weak_ref.h"
@@ skipping 114 matching lines @@
   // Moves the give child ViewAndroid to the front of the list so that it can be
   // the first responder of events.
   void MoveToFront(ViewAndroid* child);
 
   // Detaches this view from its parent.
   void RemoveFromParent();
 
   // Sets the layout relative to parent. Used to do hit testing against events.
   void SetLayout(LayoutParams params);
 
+  void ClearThumbnailPlaceholder();
+
   bool StartDragAndDrop(const base::android::JavaRef<jstring>& jtext,
                         const base::android::JavaRef<jobject>& jimage);
 
   gfx::Size GetPhysicalBackingSize();
   void OnPhysicalBackingSizeChanged(const gfx::Size& size);
   void OnBackgroundColorChanged(unsigned int color);
   void OnTopControlsChanged(float top_controls_offset,
                             float top_content_offset);
   void OnBottomControlsChanged(float bottom_controls_offset,
                                float bottom_content_offset);
@@ skipping 74 matching lines @@
 
   gfx::Vector2dF content_offset_;  // in CSS pixel.
   std::unique_ptr<EventForwarder> event_forwarder_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewAndroid);
 };
 
 }  // namespace ui
 
 #endif  // UI_ANDROID_VIEW_ANDROID_H_