First pass at removal of unneeded dependencies on skia\ext\platform_canvas.h

content/plugin/webplugin_proxy.h

 // Copyright (c) 2011 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_PLUGIN_WEBPLUGIN_PROXY_H_
 #define CONTENT_PLUGIN_WEBPLUGIN_PROXY_H_
 #pragma once
 
 #include <string>
 
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #if defined(OS_MACOSX)
 #include "base/mac/scoped_cftyperef.h"
 #endif
 #include "base/memory/scoped_handle.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "base/timer.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_message.h"
 #if defined(USE_X11)
 #include "ui/base/x/x11_util.h"
 #endif
 #include "ui/gfx/surface/transport_dib.h"
 #include "webkit/plugins/npapi/webplugin.h"
 
 class PluginChannel;
 
+namespace skia {
+class PlatformCanvas;
+}
+
 namespace webkit {
 namespace npapi {
 class WebPluginDelegateImpl;
 }
 }
 
 #if defined(OS_MACOSX)
 class WebPluginAcceleratedSurfaceProxy;
 #endif
 
@@ skipping 177 matching lines @@
 
 #endif
 
   // Contains the routing id of the host render view.
   int host_render_view_routing_id_;
 
   ScopedRunnableMethodFactory<WebPluginProxy> runnable_method_factory_;
 };
 
 #endif  // CONTENT_PLUGIN_WEBPLUGIN_PROXY_H_