Formalize a RenderFrameHost::AddMessageToConsole() API.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 5beb236fb01e24e24536d64345cf2d6ab14b078b..24894103ca3ca334be4f18ffb4c37ab45fbd4687 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1005,6 +1005,7 @@ bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(InputMsg_ExecuteNoValueEditCommand,
                         OnExecuteNoValueEditCommand)
     IPC_MESSAGE_HANDLER(FrameMsg_CSSInsertRequest, OnCSSInsertRequest)
+    IPC_MESSAGE_HANDLER(FrameMsg_AddMessageToConsole, OnAddMessageToConsole)
     IPC_MESSAGE_HANDLER(FrameMsg_JavaScriptExecuteRequest,
                         OnJavaScriptExecuteRequest)
     IPC_MESSAGE_HANDLER(FrameMsg_JavaScriptExecuteRequestForTests,
@@ -1338,6 +1339,12 @@ void RenderFrameImpl::OnCSSInsertRequest(const std::string& css) {
   frame_->document().insertStyleSheet(WebString::fromUTF8(css));
 }
 
+void RenderFrameImpl::OnAddMessageToConsole(ConsoleMessageLevel level,
+                                            const std::string& message) {
+  if (devtools_agent_)
+    devtools_agent_->AddMessageToConsole(level, message);
+}
+
 void RenderFrameImpl::OnJavaScriptExecuteRequest(
     const base::string16& jscript,
     int id,