[DevTools] Switch from separate sendMessageToBackend method to using embedder.

Source/core/inspector/InspectorFrontendHost.cpp

 /*
  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 171 matching lines @@
             unsigned symbol = static_cast<unsigned>(c);
             String symbolCode = String::format("\\u%04X", symbol);
             dst.append(symbolCode);
         } else {
             dst.append(c);
         }
     }
     return dst.toString();
 }
 
-void InspectorFrontendHost::sendMessageToBackend(const String& message)
-{
-    if (m_client)
-        m_client->sendMessageToBackend(escapeUnicodeNonCharacters(message));
-}
-
 void InspectorFrontendHost::sendMessageToEmbedder(const String& message)
 {
     if (m_client)
         m_client->sendMessageToEmbedder(escapeUnicodeNonCharacters(message));
 }
 
 void InspectorFrontendHost::showContextMenu(Page* page, float x, float y, const Vector<ContextMenuItem>& items)
 {
     ASSERT(m_frontendPage);
     ScriptState* frontendScriptState = ScriptState::forMainWorld(m_frontendPage->deprecatedLocalMainFrame());
@@ skipping 42 matching lines @@
 {
     return m_client && m_client->isUnderTest();
 }
 
 bool InspectorFrontendHost::isHostedMode()
 {
     return false;
 }
 
 } // namespace blink