Add mouse input forwarding to gpu service

content/common/gpu/gpu_command_buffer_stub.h

Index: content/common/gpu/gpu_command_buffer_stub.h
diff --git a/content/common/gpu/gpu_command_buffer_stub.h b/content/common/gpu/gpu_command_buffer_stub.h
index 6f69a2a3d86ae4c8502aa4ec2337b262a70ef548..10f041d61d81eb7c57ad498c8a08d3013e11c3e3 100644
--- a/content/common/gpu/gpu_command_buffer_stub.h
+++ b/content/common/gpu/gpu_command_buffer_stub.h
@@ -35,6 +35,7 @@ namespace gpu {
 struct Mailbox;
 namespace gles2 {
 class MailboxManager;
+class ValuebufferManager;
 }
 }
 
@@ -69,6 +70,7 @@ class GpuCommandBufferStub
       GpuCommandBufferStub* share_group,
       const gfx::GLSurfaceHandle& handle,
       gpu::gles2::MailboxManager* mailbox_manager,
+      gpu::gles2::ValuebufferManager* valuebuffer_manager,
       const gfx::Size& size,
       const gpu::gles2::DisallowedFeatures& disallowed_features,
       const std::vector<int32>& attribs,