Plumb GpuMemoryBuffer allocation to GPU process.

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 9e320e0a6d77452a0bd855ca1bfcc937d73b0b2e..b937e4cf9ad0165b37a630c0da73f75a5d672176 100644
--- a/content/common/gpu/gpu_messages.h
+++ b/content/common/gpu/gpu_messages.h
@@ -235,6 +235,16 @@ IPC_STRUCT_TRAITS_BEGIN(gfx::GLSurfaceHandle)
   IPC_STRUCT_TRAITS_MEMBER(parent_client_id)
 IPC_STRUCT_TRAITS_END()
 
+IPC_STRUCT_TRAITS_BEGIN(gfx::GpuMemoryBufferParams)
+  IPC_STRUCT_TRAITS_MEMBER(width)
+  IPC_STRUCT_TRAITS_MEMBER(height)
+  IPC_STRUCT_TRAITS_MEMBER(internalformat)
+  IPC_STRUCT_TRAITS_MEMBER(usage)
+  IPC_STRUCT_TRAITS_MEMBER(window)
+  IPC_STRUCT_TRAITS_MEMBER(process_handle)
+  IPC_STRUCT_TRAITS_MEMBER(client_id)
+IPC_STRUCT_TRAITS_END()
+
 //------------------------------------------------------------------------------
 // GPU Messages
 // These are messages from the browser to the GPU process.
@@ -276,6 +286,10 @@ IPC_MESSAGE_CONTROL3(GpuMsg_CreateImage,
                      int32, /* client_id */
                      int32 /* image_id */)
 
+// Allocate a buffer asynchronously in the GPU process.
+IPC_MESSAGE_CONTROL1(GpuMsg_AllocateGpuMemoryBuffer,
+                     gfx::GpuMemoryBufferParams /* params */)
+
 // Tells the GPU process to delete image.
 IPC_MESSAGE_CONTROL3(GpuMsg_DeleteImage,
                      int32, /* client_id */
@@ -368,6 +382,10 @@ IPC_MESSAGE_CONTROL1(GpuHostMsg_DestroyCommandBuffer,
 IPC_MESSAGE_CONTROL1(GpuHostMsg_ImageCreated,
                      gfx::Size /* size */)
 
+// Response from GPU to a GpuMsg_AllocateGpuMemoryBuffer message.
+IPC_MESSAGE_CONTROL1(GpuHostMsg_GpuMemoryBufferAllocated,
+                     gfx::GpuMemoryBufferHandle /* handle */)
+
 // Response from GPU to a GpuMsg_CollectGraphicsInfo.
 IPC_MESSAGE_CONTROL1(GpuHostMsg_GraphicsInfoCollected,
                      gpu::GPUInfo /* GPU logging stats */)