content: Add multi-proc surface texture support.

content/common/gpu/gpu_messages.h

Index: content/common/gpu/gpu_messages.h
diff --git a/content/common/gpu/gpu_messages.h b/content/common/gpu/gpu_messages.h
index 1f8c72d62ece00c32539080578afd343566acb2a..3e2b7a00622695aabd85597d4e0c9f7565367085 100644
--- a/content/common/gpu/gpu_messages.h
+++ b/content/common/gpu/gpu_messages.h
@@ -312,6 +312,11 @@ IPC_MESSAGE_CONTROL0(GpuMsg_Hang)
 // Tells the GPU process to disable the watchdog thread.
 IPC_MESSAGE_CONTROL0(GpuMsg_DisableWatchdog)
 
+// Tells the GPU process to create a new surface texture.
+IPC_MESSAGE_CONTROL2(GpuMsg_CreateSurfaceTexture,
+                     int32, /* surface_texture_id */
+                     int32 /* process_handle */)
+
 //------------------------------------------------------------------------------
 // GPU Host Messages
 // These are messages to the browser.
@@ -368,6 +373,10 @@ IPC_MESSAGE_CONTROL1(GpuHostMsg_DestroyCommandBuffer,
 IPC_MESSAGE_CONTROL1(GpuHostMsg_ImageCreated,
                      gfx::Size /* size */)
 
+// Response from GPU to a GpuMsg_CreateSurfaceTexture message.
+IPC_MESSAGE_CONTROL1(GpuHostMsg_SurfaceTextureCreated,
+                     int32 /* surface_texture_id */)
+
 // Response from GPU to a GpuMsg_CollectGraphicsInfo.
 IPC_MESSAGE_CONTROL1(GpuHostMsg_GraphicsInfoCollected,
                      gpu::GPUInfo /* GPU logging stats */)