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..07b64e3e1790021de8ec4c5606197f4a6cd82994 100644
--- a/content/browser/devtools/render_frame_devtools_agent_host.cc
+++ b/content/browser/devtools/render_frame_devtools_agent_host.cc
@@ -301,6 +301,11 @@ bool DevToolsAgentHost::HasFor(WebContents* web_contents) {
 }
 
 // static
+bool DevToolsAgentHost::HasFor(RenderFrameHost* frame_host) {
+  return FindAgentHost(frame_host) != NULL;
+}
+
+// static
 bool DevToolsAgentHost::IsDebuggerAttached(WebContents* web_contents) {
   RenderFrameDevToolsAgentHost* agent_host = FindAgentHost(web_contents);
   return agent_host && agent_host->IsAttached();