Refactoring: de-couple Extensions from "script injection System" [render side]:2

extensions/renderer/user_script_injector.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_injector.h"
 
 #include <vector>
 
 #include "base/lazy_instance.h"
 #include "content/public/common/url_constants.h"
+#include "content/public/renderer/render_view.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/permissions/permissions_data.h"
 #include "extensions/renderer/injection_host.h"
 #include "extensions/renderer/script_context.h"
 #include "extensions/renderer/scripts_run_info.h"
 #include "grit/extensions_renderer_resources.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 #include "third_party/WebKit/public/web/WebScriptSource.h"
 #include "ui/base/resource/resource_bundle.h"
@@ skipping 99 matching lines @@
     UserScript::RunLocation run_location) const {
   return run_location == UserScript::DOCUMENT_START &&
          !script_->css_scripts().empty();
 }
 
 PermissionsData::AccessType UserScriptInjector::CanExecuteOnFrame(
     const InjectionHost* injection_host,
     blink::WebFrame* web_frame,
     int tab_id,
     const GURL& top_url) const {
+  if (script_->consumer_instance_type() ==
+      UserScript::ConsumerInstanceType::WEBVIEW) {
+    int routing_id = content::RenderView::FromWebView(web_frame->top()->view())
+                        ->GetRoutingID();
+    return script_->routing_info().render_view_id == routing_id
+        ? PermissionsData::ACCESS_ALLOWED
+        : PermissionsData::ACCESS_DENIED;
+  }
+
   // If we don't have a tab id, we have no UI surface to ask for user consent.
   // For now, we treat this as an automatic allow.
   if (tab_id == -1)
     return PermissionsData::ACCESS_ALLOWED;
 
   GURL effective_document_url = ScriptContext::GetEffectiveDocumentURL(
       web_frame, web_frame->document().url(), script_->match_about_blank());
   return injection_host->CanExecuteOnFrame(
       effective_document_url, top_url, tab_id, is_declarative_);
 }
@@ skipping 62 matching lines @@
   }
 
   if (ShouldInjectCss(run_location))
     scripts_run_info->num_css += script_->css_scripts().size();
 }
 
 void UserScriptInjector::OnWillNotInject(InjectFailureReason reason) {
 }
 
 }  // namespace extensions