Delete blink::WebGraphicsContext3D and cc_blink::ContextProviderWebContext

content/common/gpu/client/context_provider_command_buffer.cc

Index: content/common/gpu/client/context_provider_command_buffer.cc
diff --git a/content/common/gpu/client/context_provider_command_buffer.cc b/content/common/gpu/client/context_provider_command_buffer.cc
index 1ee2a716e3ef4c6028b7668a467358e0b4a6dd7c..9636ffef6d8c382028d48299a6c2a320f9653857 100644
--- a/content/common/gpu/client/context_provider_command_buffer.cc
+++ b/content/common/gpu/client/context_provider_command_buffer.cc
@@ -90,14 +90,6 @@ ContextProviderCommandBuffer::GetCommandBufferProxy() {
   return context3d_->GetCommandBufferProxy();
 }
 
-WebGraphicsContext3DCommandBufferImpl*
-ContextProviderCommandBuffer::WebContext3D() {
-  DCHECK(context3d_);
-  DCHECK(lost_context_callback_proxy_);  // Is bound to thread.
-  DCHECK(context_thread_checker_.CalledOnValidThread());
-  return context3d_.get();
-}
-
 bool ContextProviderCommandBuffer::BindToCurrentThread() {
   // This is called on the thread the context will be used.
   DCHECK(context_thread_checker_.CalledOnValidThread());