content: Cleanup class/struct forward declarations

content/public/test/layouttest_support.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_LAYOUTTEST_SUPPORT_H_
 #define CONTENT_PUBLIC_TEST_LAYOUTTEST_SUPPORT_H_
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "cc/layers/texture_layer.h"
 #include "third_party/WebKit/public/platform/modules/screen_orientation/WebScreenOrientationType.h"
 
 class GURL;
 
 namespace blink {
 class WebDeviceMotionData;
 class WebDeviceOrientationData;
 class WebGamepad;
-class WebGamepads;
 class WebInputEvent;
-class WebLayer;
 class WebLocalFrame;
 struct WebSize;
 class WebView;
 class WebWidget;
 class WebURLResponse;
 }
 
-namespace device {
-class BluetoothAdapter;
-}
-
 namespace gfx {
 class ICCProfile;
 }
 
 namespace test_runner {
 class WebFrameTestProxyBase;
 class WebViewTestProxyBase;
 class WebWidgetTestProxyBase;
 }
 
@@ skipping 127 matching lines @@
 // Provides a text dump of the contents of the given page state.
 std::string DumpBackForwardList(std::vector<PageState>& page_state,
                                 size_t current_index);
 
 // Run all pending idle tasks immediately, and then invoke callback.
 void SchedulerRunIdleTasks(const base::Closure& callback);
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_LAYOUTTEST_SUPPORT_H_