Make the Pepper proxy support in-process font rendering.

ppapi/proxy/ppb_image_data_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 PPAPI_PPB_IMAGE_DATA_PROXY_H_
 #define PPAPI_PPB_IMAGE_DATA_PROXY_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_size.h"
 #include "ppapi/c/pp_var.h"
 #include "ppapi/proxy/interface_proxy.h"
 #include "ppapi/proxy/plugin_resource.h"
 #include "ppapi/proxy/serialized_structs.h"
 #include "ppapi/shared_impl/image_data_impl.h"
 #include "ppapi/thunk/ppb_image_data_api.h"
 
 struct PPB_ImageData;
+class TransportDIB;
+
+namespace skia {
+class PlatformCanvas;
+}
 
 namespace pp {
 namespace proxy {
 
 class HostResource;
 
 class PPB_ImageData_Proxy : public InterfaceProxy {
  public:
   PPB_ImageData_Proxy(Dispatcher* dispatcher, const void* target_interface);
   virtual ~PPB_ImageData_Proxy();
@@ skipping 21 matching lines @@
   virtual ::ppapi::thunk::PPB_ImageData_API* AsImageData_API();
 
   // Resource overrides.
   virtual ImageData* AsImageData();
 
   // PPB_ImageData API.
   virtual PP_Bool Describe(PP_ImageDataDesc* desc);
   virtual void* Map();
   virtual void Unmap();
 
+  skia::PlatformCanvas* mapped_canvas() const { return mapped_canvas_.get(); }
+
   const PP_ImageDataDesc& desc() const { return desc_; }
 
   static const ImageHandle NullHandle;
   static ImageHandle HandleFromInt(int32_t i);
 
  private:
   PP_ImageDataDesc desc_;
-  ImageHandle handle_;
 
-  void* mapped_data_;
+  scoped_ptr<TransportDIB> transport_dib_;
+
+  // Null when the image isn't mapped.
+  scoped_ptr<skia::PlatformCanvas> mapped_canvas_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageData);
 };
 
 }  // namespace proxy
 }  // namespace pp
 
 #endif  // PPAPI_PPB_IMAGE_DATA_PROXY_H_