Add Pepper VideoReader and VideoWriter plumbing

ppapi/proxy/ppb_image_data_proxy.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 PPAPI_PPB_IMAGE_DATA_PROXY_H_
 #define PPAPI_PPB_IMAGE_DATA_PROXY_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "build/build_config.h"
+#include "ipc/ipc_platform_file.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/c/ppb_image_data.h"
 #include "ppapi/proxy/interface_proxy.h"
 #include "ppapi/proxy/ppapi_proxy_export.h"
@@ skipping 82 matching lines @@
   virtual ~PPB_ImageData_Proxy();
 
   static PP_Resource CreateProxyResource(PP_Instance instance,
                                          PP_ImageDataFormat format,
                                          const PP_Size& size,
                                          PP_Bool init_to_zero);
 
   // InterfaceProxy implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg);
 
+  // Utility for creating ImageData resources.
+  // This can only be called on the host side of the proxy.
+  // On failure, will return invalid resource (0). On success it will return a
+  // valid resource and the out params will be written.
+  // |desc| contains the result of Describe.
+  // |image_handle| and |byte_count| contain the result of GetSharedMemory.
+  // NOTE: if |init_to_zero| is false, you should write over the entire image
+  // to avoid leaking sensitive data to a less privileged process.
+  PPAPI_PROXY_EXPORT static PP_Resource CreateImageData(
+      PP_Instance instance,
+      PP_ImageDataFormat format,
+      const PP_Size& size,
+      bool init_to_zero,
+      bool is_nacl_plugin,
+      PP_ImageDataDesc* desc,
+      IPC::PlatformFileForTransit* image_handle,
+      uint32_t* byte_count);
+
   static const ApiID kApiID = API_ID_PPB_IMAGE_DATA;
 
  private:
   // Plugin->Host message handlers.
   void OnHostMsgCreate(PP_Instance instance,
                        int32_t format,
                        const PP_Size& size,
                        PP_Bool init_to_zero,
                        HostResource* result,
                        std::string* image_data_desc,
                        ImageHandle* result_image_handle);
   void OnHostMsgCreateNaCl(PP_Instance instance,
                            int32_t format,
                            const PP_Size& size,
                            PP_Bool init_to_zero,
                            HostResource* result,
                            std::string* image_data_desc,
                            ppapi::proxy::SerializedHandle* result_image_handle);
 
   // Host->Plugin message handlers.
   void OnPluginMsgNotifyUnusedImageData(const HostResource& old_image_data);
 
   DISALLOW_COPY_AND_ASSIGN(PPB_ImageData_Proxy);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PPB_IMAGE_DATA_PROXY_H_