Implement Wheel Gesture Scrolling on OSX.

content/public/test/browser_test_utils.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 CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_
 #define CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_
 
 #include <queue>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/process/process.h"
 #include "base/strings/string16.h"
 #include "build/build_config.h"
 #include "cc/output/compositor_frame.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/render_process_host_observer.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/common/page_type.h"
+#include "ipc/message_filter.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "url/gurl.h"
 
 #if defined(OS_WIN)
 #include "base/win/scoped_handle.h"
 #endif
 
 namespace gfx {
 class Point;
@@ skipping 372 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsAddedObserver);
 };
 
 // Request a new frame be drawn, returns false if request fails.
 bool RequestFrame(WebContents* web_contents);
 
 // Watches compositor frame changes, blocking until a frame has been
 // composited. This class is intended to be run on the main thread; to
 // synchronize the main thread against the impl thread.
-class FrameWatcher : public BrowserMessageFilter {
+class FrameWatcher : public IPC::MessageFilter {
  public:
   FrameWatcher();
 
   // Listen for new frames from the |web_contents| renderer process.
   void AttachTo(WebContents* web_contents);
 
   // Wait for |frames_to_wait| swap mesages from the compositor.
   void WaitFrames(int frames_to_wait);
 
   // Return the meta data received in the last compositor
@@ skipping 60 matching lines @@
   blink::WebInputEvent::Type wait_for_type_;
   uint32_t ack_result_;
   base::Closure quit_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMsgWatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_