Use ContextProvider subclass to provide WGC3D pointers

webkit/common/gpu/context_provider_in_process.cc

Index: webkit/common/gpu/context_provider_in_process.cc
diff --git a/webkit/common/gpu/context_provider_in_process.cc b/webkit/common/gpu/context_provider_in_process.cc
index ba293ba0fe183ed829a5203a2f9db2ee39f418dd..70d9d34bfe164bd169c06eda34d159cf8c177f55 100644
--- a/webkit/common/gpu/context_provider_in_process.cc
+++ b/webkit/common/gpu/context_provider_in_process.cc
@@ -77,6 +77,13 @@ ContextProviderInProcess::~ContextProviderInProcess() {
          context_thread_checker_.CalledOnValidThread());
 }
 
+blink::WebGraphicsContext3D* ContextProviderInProcess::WebContext3D() {
+  DCHECK(lost_context_callback_proxy_);  // Is bound to thread.
+  DCHECK(context_thread_checker_.CalledOnValidThread());
+
+  return context3d_.get();
+}
+
 bool ContextProviderInProcess::BindToCurrentThread() {
   DCHECK(context3d_);