Refactoring: de-couple Extensions from "script injection System" [render side]:4

extensions/renderer/user_script_set.cc

 // 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.
 
 #include "extensions/renderer/user_script_set.h"
 
 #include "base/memory/ref_counted.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/renderer/render_thread.h"
 #include "extensions/common/extension.h"
@@ skipping 67 matching lines @@
         web_frame,
         tab_id,
         run_location,
         document_url,
         false /* is_declarative */);
     if (injection.get())
       injections->push_back(injection.release());
   }
 }
 
-bool UserScriptSet::UpdateUserScripts(
-    base::SharedMemoryHandle shared_memory,
-    const std::set<std::string>& changed_extensions) {
+bool UserScriptSet::UpdateUserScripts(base::SharedMemoryHandle shared_memory,
+                                      const std::set<HostID>& changed_hosts) {
   bool only_inject_incognito =
       ExtensionsRendererClient::Get()->IsIncognitoProcess();
 
   // Create the shared memory object (read only).
   shared_memory_.reset(new base::SharedMemory(shared_memory, true));
   if (!shared_memory_.get())
     return false;
 
   // First get the size of the memory block.
   if (!shared_memory_->Map(sizeof(Pickle::Header)))
@@ skipping 38 matching lines @@
     }
 
     if (only_inject_incognito && !script->is_incognito_enabled())
       continue;  // This script shouldn't run in an incognito tab.
 
     scripts_.push_back(script.release());
   }
 
   FOR_EACH_OBSERVER(Observer,
                     observers_,
-                    OnUserScriptsUpdated(changed_extensions, scripts_.get()));
+                    OnUserScriptsUpdated(changed_hosts, scripts_.get()));
   return true;
 }
 
 scoped_ptr<ScriptInjection> UserScriptSet::GetDeclarativeScriptInjection(
     int script_id,
     blink::WebFrame* web_frame,
     int tab_id,
     UserScript::RunLocation run_location,
     const GURL& document_url) {
   for (ScopedVector<UserScript>::const_iterator it = scripts_.begin();
@@ skipping 63 matching lines @@
         injector.Pass(),
         web_frame->toWebLocalFrame(),
         injection_host.Pass(),
         run_location,
         tab_id));
   }
   return injection.Pass();
 }
 
 }  // namespace extensions