content: Add multi-proc surface texture support.

content/browser/gpu/gpu_process_host.h

Index: content/browser/gpu/gpu_process_host.h
diff --git a/content/browser/gpu/gpu_process_host.h b/content/browser/gpu/gpu_process_host.h
index 32345b728004ebb1ee017b1268b425e65143ed2d..2ef5fc2837b99852f28d1926a9ae6167335e2c9d 100644
--- a/content/browser/gpu/gpu_process_host.h
+++ b/content/browser/gpu/gpu_process_host.h
@@ -63,6 +63,8 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
 
   typedef base::Callback<void(const gfx::Size)> CreateImageCallback;
 
+  typedef base::Closure CreateSurfaceTextureCallback;
+
   static bool gpu_enabled() { return gpu_enabled_; }
 
   // Creates a new GpuProcessHost or gets an existing one, resulting in the
@@ -124,6 +126,12 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
     // Tells the GPU process to delete image.
   void DeleteImage(int client_id, int image_id, int sync_point);
 
+  // Tells the GPU process to create a new surface texture using the given id.
+  void CreateSurfaceTexture(
+      int surface_texture_id,
+      base::ProcessHandle process_handle,
+      const CreateSurfaceTextureCallback& callback);
+
   // What kind of GPU process, e.g. sandboxed or unsandboxed.
   GpuProcessKind kind();
 
@@ -158,6 +166,7 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
   void OnCommandBufferCreated(const int32 route_id);
   void OnDestroyCommandBuffer(int32 surface_id);
   void OnImageCreated(const gfx::Size size);
+  void OnSurfaceTextureCreated();
   void OnDidCreateOffscreenContext(const GURL& url);
   void OnDidLoseContext(bool offscreen,
                         gpu::error::ContextLostReason reason,
@@ -205,6 +214,8 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
   // The pending create image requests we need to reply to.
   std::queue<CreateImageCallback> create_image_requests_;
 
+  // The pending create surface texture requests we need to reply to.
+  std::queue<CreateSurfaceTextureCallback> create_surface_texture_requests_;
 
   // Qeueud messages to send when the process launches.
   std::queue<IPC::Message*> queued_messages_;