[DevTools] Merge InspectorFrontendClientImpl into WebDevToolsFrontendImpl and remove unused code.

public/web/WebDevToolsFrontend.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 25 matching lines @@
 namespace blink {
 
 class WebDevToolsFrontendClient;
 class WebString;
 class WebView;
 
 // WebDevToolsFrontend represents DevTools client sitting in the Glue. It provides
 // direct and delegate Apis to the host.
 class WebDevToolsFrontend {
 public:
-    BLINK_EXPORT static WebDevToolsFrontend* create(WebView* view,
-                                                     WebDevToolsFrontendClient* client,
-                                                     const WebString& applicationLocale);
+    BLINK_EXPORT static WebDevToolsFrontend* create(
+        WebView*,
+        WebDevToolsFrontendClient*,
+        const WebString& applicationLocale);
 
     virtual ~WebDevToolsFrontend() {}
-
-    virtual void dispatchOnInspectorFrontend(const WebString&) = 0;
 };
 
 } // namespace blink
 
 #endif