DevTools: get rid of delayed command dispatching on front-end side.

chrome/common/devtools_messages_internal.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This header is meant to be included in multiple passes, hence no traditional
 // header guard.
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 // Developer tools consist of the following parts:
 //
@@ skipping 57 matching lines @@
 // browser.
 IPC_BEGIN_MESSAGES(DevToolsAgent)
 
   // Tells agent that there is a client host connected to it.
   IPC_MESSAGE_CONTROL1(DevToolsAgentMsg_Attach,
                        std::vector<std::string> /* runtime_features */)
 
   // Tells agent that there is no longer a client host connected to it.
   IPC_MESSAGE_CONTROL0(DevToolsAgentMsg_Detach)
 
+  // Tells agent that the front-end has been loaded
+  IPC_MESSAGE_CONTROL0(DevToolsAgentMsg_FrontendLoaded)
+
   // WebKit-level transport.
   IPC_MESSAGE_CONTROL1(DevToolsAgentMsg_DispatchOnInspectorBackend,
                        std::string /* message */)
 
   // Send debugger command to the debugger agent. Debugger commands should
   // be handled on IO thread(while all other devtools messages are handled in
   // the render thread) to allow executing the commands when v8 is on a
   // breakpoint.
   IPC_MESSAGE_CONTROL1(DevToolsAgentMsg_DebuggerCommand,
                        std::string  /* command */)
 
   // This command is sent to debugger when user wants to pause script execution
   // immediately. This message should be processed on the IO thread so that it
   // can have effect even if the Renderer thread is busy with JavaScript
   // execution.
   IPC_MESSAGE_CONTROL0(DevToolsAgentMsg_DebuggerPauseScript)
 
   // Inspect element with the given coordinates.
   IPC_MESSAGE_CONTROL2(DevToolsAgentMsg_InspectElement,
                        int /* x */,
                        int /* y */)
 
   // Enables/disables the apu agent.
   IPC_MESSAGE_CONTROL1(DevToolsAgentMsg_SetApuAgentEnabled, bool /* enabled */)
 
 IPC_END_MESSAGES(DevToolsAgent)