content: Cleanup class/struct forward declarations

content/browser/android/synchronous_compositor_host.h

 // Copyright 2015 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_SYNCHRONOUS_COMPOSITOR_HOST_H_
 #define CONTENT_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_HOST_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "cc/output/compositor_frame.h"
 #include "content/common/input/input_event_ack_state.h"
 #include "content/public/browser/android/synchronous_compositor.h"
 #include "ui/gfx/geometry/scroll_offset.h"
 #include "ui/gfx/geometry/size_f.h"
 
 namespace IPC {
 class Message;
 class Sender;
 }
 
-namespace blink {
-class WebInputEvent;
-}
-
-namespace cc {
-struct BeginFrameArgs;
-}
-
 namespace ui {
 class WindowAndroid;
 struct DidOverscrollParams;
 }
 
 namespace content {
 
 class RenderWidgetHostViewAndroid;
 class SynchronousCompositorClient;
 class SynchronousCompositorBrowserFilter;
@@ skipping 76 matching lines @@
   bool need_animate_scroll_;
   uint32_t need_invalidate_count_;
   uint32_t did_activate_pending_tree_count_;
 
   DISALLOW_COPY_AND_ASSIGN(SynchronousCompositorHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_HOST_H_