Simplify platform_canvas.h by recognizing that PlatformCanvas does not actually extend

webkit/plugins/ppapi/plugin_delegate.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 WEBKIT_PLUGINS_PPAPI_PLUGIN_DELEGATE_H_
 #define WEBKIT_PLUGINS_PPAPI_PLUGIN_DELEGATE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 17 matching lines @@
 #include "ppapi/c/private/ppb_flash.h"
 #include "ppapi/c/private/ppb_udp_socket_private.h"
 #include "ppapi/shared_impl/dir_contents.h"
 #include "ui/gfx/size.h"
 #include "webkit/fileapi/file_system_types.h"
 #include "webkit/glue/clipboard_client.h"
 #include "webkit/quota/quota_types.h"
 
 class GURL;
 class SkBitmap;
+class SkCanvas;
 class TransportDIB;
 struct PP_HostResolver_Private_Hint;
 struct PP_NetAddress_Private;
 
 namespace base {
 class MessageLoopProxy;
 class Time;
 }
 
 namespace fileapi {
@@ skipping 15 matching lines @@
 struct DeviceRefData;
 struct HostPortPair;
 struct Preferences;
 
 namespace thunk {
 class ResourceCreationAPI;
 }
 
 }  // namespace ppapi
 
-namespace skia {
-class PlatformCanvas;
-}
-
 namespace WebKit {
 class WebGamepads;
 class WebPlugin;
 struct WebCompositionUnderline;
 struct WebCursorInfo;
 }
 
 namespace webkit_glue {
 class ClipboardClient;
 class P2PTransport;
@@ skipping 66 matching lines @@
     virtual void RemoveInstance(PP_Instance instance) = 0;
   };
 
   // Represents an image. This is to allow the browser layer to supply a correct
   // image representation. In Chrome, this will be a TransportDIB.
   class PlatformImage2D {
    public:
     virtual ~PlatformImage2D() {}
 
     // Caller will own the returned pointer, returns NULL on failure.
-    virtual skia::PlatformCanvas* Map() = 0;
+    virtual SkCanvas* Map() = 0;
 
     // Returns the platform-specific shared memory handle of the data backing
     // this image. This is used by PPAPI proxying to send the image to the
     // out-of-process plugin. On success, the size in bytes will be placed into
     // |*bytes_count|. Returns 0 on failure.
     virtual intptr_t GetSharedMemoryHandle(uint32* byte_count) const = 0;
 
     virtual TransportDIB* GetTransportDIB() const = 0;
   };
 
@@ skipping 501 matching lines @@
   // Returns restrictions on local data handled by the plug-in.
   virtual PP_FlashLSORestrictions GetLocalDataRestrictions(
       const GURL& document_url,
       const GURL& plugin_url) = 0;
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PLUGIN_DELEGATE_H_