implement getBufferSubDataAsync prototype

content/renderer/webgraphicscontext3d_provider_impl.cc

Index: content/renderer/webgraphicscontext3d_provider_impl.cc
diff --git a/content/renderer/webgraphicscontext3d_provider_impl.cc b/content/renderer/webgraphicscontext3d_provider_impl.cc
index dbdae19792963957c4de968f9b113a4e96a3c172..b4b4d67af244fc5ba074463ef2468938473c1e96 100644
--- a/content/renderer/webgraphicscontext3d_provider_impl.cc
+++ b/content/renderer/webgraphicscontext3d_provider_impl.cc
@@ -46,4 +46,9 @@ void WebGraphicsContext3DProviderImpl::setErrorMessageCallback(
   provider_->ContextSupport()->SetErrorMessageCallback(c);
 }
 
+void WebGraphicsContext3DProviderImpl::signalQuery(

[esprehn, 2016/10/18 01:44:16]

I know this whole file does it but we don't usually abbreviate, so this would be
callback

[Kai Ninomiya, 2016/10/19 17:54:11]

Done.

+    uint32_t query, const base::Closure& c) {
+  provider_->ContextSupport()->SignalQuery(query, c);
+}
+
 }  // namespace content