[Android] Disable the refresh effect for fullscreen HTML5 scenarios

content/browser/android/overscroll_controller_android.h

 // Copyright 2014 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 CONTENT_BROWSER_ANDROID_OVERSCROLL_CONTROLLER_ANDROID_H_
 #define CONTENT_BROWSER_ANDROID_OVERSCROLL_CONTROLLER_ANDROID_H_
 
 #include "base/time/time.h"
 #include "content/browser/android/overscroll_glow.h"
 #include "content/browser/android/overscroll_refresh.h"
@@ skipping 61 matching lines @@
   void SetNeedsAnimate();
 
   ui::WindowAndroidCompositor* const compositor_;
   const float dpi_scale_;
 
   bool enabled_;
 
   // TODO(jdduke): Factor out a common API from the two overscroll effects.
   scoped_ptr<OverscrollGlow> glow_effect_;
   scoped_ptr<OverscrollRefresh> refresh_effect_;
-  bool has_initialized_refresh_effect_;
+
+  // For fullscreen HTML5 scenarios, the refresh effect will be disabled.
   bool is_fullscreen_;
 
   DISALLOW_COPY_AND_ASSIGN(OverscrollControllerAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_OVERSCROLL_CONTROLLER_ANDROID_H_