[Extensions] Don't allow extensions to inject scripts into extension pages

extensions/renderer/script_injection.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_INJECTION_H_
 #define EXTENSIONS_RENDERER_SCRIPT_INJECTION_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/macros.h"
@@ skipping 35 matching lines @@
 
   // Return the id of the injection host associated with the given world.
   static std::string GetHostIdForIsolatedWorld(int world_id);
 
   // Remove the isolated world associated with the given injection host.
   static void RemoveIsolatedWorld(const std::string& host_id);
 
   ScriptInjection(scoped_ptr<ScriptInjector> injector,
                   content::RenderFrame* render_frame,
                   scoped_ptr<const InjectionHost> injection_host,
-                  UserScript::RunLocation run_location,
-                  int tab_id);
+                  UserScript::RunLocation run_location);
   ~ScriptInjection();
 
   // Try to inject the script at the |current_location|. This returns
   // INJECTION_FINISHED if injection has injected or will never inject, returns
   // INJECTION_BLOCKED if injection is running asynchronously and has not
   // finished yet, returns INJECTION_WAITING if injections is delayed (either
   // for permission purposes or because |current_location| is not the designated
   // |run_location_|).
   // If INJECTION_BLOCKED is returned, |async_completion_callback| will be
   // called upon completion.
@@ skipping 42 matching lines @@
 
   // The RenderFrame into which this should inject the script.
   content::RenderFrame* render_frame_;
 
   // The associated injection host.
   scoped_ptr<const InjectionHost> injection_host_;
 
   // The location in the document load at which we inject the script.
   UserScript::RunLocation run_location_;
 
-  // The tab id associated with the frame.
-  int tab_id_;
-
   // This injection's request id. This will be -1 unless the injection is
   // currently waiting on permission.
   int64 request_id_;
 
   // Whether or not the injection is complete, either via injecting the script
   // or because it will never complete.
   bool complete_;
 
   // Whether or not the injection successfully injected JS.
   bool did_inject_js_;
 
   // Results storage.
   scoped_ptr<base::Value> execution_result_;
 
   // The callback to run upon completing asynchronously.
   CompletionCallback async_completion_callback_;
 
   base::WeakPtrFactory<ScriptInjection> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ScriptInjection);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_SCRIPT_INJECTION_H_