Remove access to WebContents in RWHVA::SynchronousFrameMetadata()

content/browser/devtools/render_frame_devtools_agent_host.cc

Index: content/browser/devtools/render_frame_devtools_agent_host.cc
diff --git a/content/browser/devtools/render_frame_devtools_agent_host.cc b/content/browser/devtools/render_frame_devtools_agent_host.cc
index 0ac0be935d479efc60b8a33d0e14db89a88843c7..a5fbaa45d216a7cc26a97a36cbdb03c6229dfdce 100644
--- a/content/browser/devtools/render_frame_devtools_agent_host.cc
+++ b/content/browser/devtools/render_frame_devtools_agent_host.cc
@@ -389,6 +389,11 @@ void RenderFrameDevToolsAgentHost::WebContentsCreated(
   }
 }
 
+// static
+bool RenderFrameDevToolsAgentHost::HasFor(RenderFrameHost* frame_host) {
+  return FindAgentHost(frame_host) != NULL;
+}
+
 RenderFrameDevToolsAgentHost::RenderFrameDevToolsAgentHost(
     RenderFrameHostImpl* host)
     : DevToolsAgentHostImpl(base::GenerateGUID()),