Add optimization for CHROMIUM_subscribe_uniform extension.

content/common/gpu/gpu_command_buffer_stub.cc

Index: content/common/gpu/gpu_command_buffer_stub.cc
diff --git a/content/common/gpu/gpu_command_buffer_stub.cc b/content/common/gpu/gpu_command_buffer_stub.cc
index eb09a147de7f20a75575a2cf7f1689ef4e3c419c..ec35271d2bc0ba2b3d32288f097691f39ec01a4f 100644
--- a/content/common/gpu/gpu_command_buffer_stub.cc
+++ b/content/common/gpu/gpu_command_buffer_stub.cc
@@ -148,6 +148,7 @@ GpuCommandBufferStub::GpuCommandBufferStub(
     GpuCommandBufferStub* share_group,
     const gfx::GLSurfaceHandle& handle,
     gpu::gles2::MailboxManager* mailbox_manager,
+    gpu::gles2::SubscriptionRefSet* subscription_ref_set,
     gpu::ValueStateMap* pending_valuebuffer_state,
     const gfx::Size& size,
     const gpu::gles2::DisallowedFeatures& disallowed_features,
@@ -193,6 +194,7 @@ GpuCommandBufferStub::GpuCommandBufferStub(
         new GpuCommandBufferMemoryTracker(channel),
         channel_->gpu_channel_manager()->shader_translator_cache(),
         NULL,
+        subscription_ref_set,
         pending_valuebuffer_state,
         attrib_parser.bind_generates_resource);
   }