extensions: Cleanup class/struct fwd declarations

extensions/renderer/script_injector.h

 // Copyright 2014 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.
 
 #ifndef EXTENSIONS_RENDERER_SCRIPT_INJECTOR_H_
 #define EXTENSIONS_RENDERER_SCRIPT_INJECTOR_H_
 
 #include <memory>
 #include <vector>
 
 #include "extensions/common/permissions/permissions_data.h"
 #include "extensions/common/user_script.h"
 #include "third_party/WebKit/public/web/WebScriptSource.h"
 
-class GURL;
 class InjectionHost;
 
 namespace blink {
 class WebLocalFrame;
 }
 
 namespace extensions {
-struct ScriptsRunInfo;
 
 // The pseudo-delegate class for a ScriptInjection that provides all necessary
 // information about how to inject the script, including what code to inject,
 // when (run location), and where (world), but without any injection logic.
 class ScriptInjector {
  public:
   // The possible reasons for not injecting the script.
   enum InjectFailureReason {
     EXTENSION_REMOVED,  // The extension was removed before injection.
     NOT_ALLOWED,        // The script is not allowed to inject.
@@ skipping 58 matching lines @@
   // Notifies the script that injection will never occur.
   // |render_frame| contains the render frame, or null if the frame was
   // invalidated.
   virtual void OnWillNotInject(InjectFailureReason reason,
                                content::RenderFrame* render_frame) = 0;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_SCRIPT_INJECTOR_H_