blink: Remove unused or rarely used methods from WebGraphicsContext3D

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 2560d78067b4e15e3d6709de7f7e08da6c800f96..c57e5a453a9cf93d5fa3a31196fb8a1f7b3c4a6a 100644
--- a/content/common/gpu/client/context_provider_command_buffer.cc
+++ b/content/common/gpu/client/context_provider_command_buffer.cc
@@ -107,8 +107,8 @@ bool ContextProviderCommandBuffer::BindToCurrentThread() {
 
   std::string unique_context_name =
       base::StringPrintf("%s-%p", debug_name_.c_str(), WebContext3DNoChecks());
-  WebContext3DNoChecks()->traceBeginCHROMIUM("gpu_toplevel",
-                                             unique_context_name.c_str());
+  WebContext3DNoChecks()->GetImplementation()->TraceBeginCHROMIUM(
+      "gpu_toplevel", unique_context_name.c_str());
 
   lost_context_callback_proxy_.reset(new LostContextCallbackProxy(this));
   return true;