Refactoring: de-couple Extensions from "script injection System" [render side] : 1

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 "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"
 #include "url/gurl.h"
 
 namespace extensions {
@@ skipping 92 matching lines @@
          !script_->js_scripts().empty();
 }
 
 bool UserScriptInjector::ShouldInjectCss(
     UserScript::RunLocation run_location) const {
   return run_location == UserScript::DOCUMENT_START &&
          !script_->css_scripts().empty();
 }
 
 PermissionsData::AccessType UserScriptInjector::CanExecuteOnFrame(
-    const Extension* extension,
+    const InjectionHost* injection_host,
     blink::WebFrame* web_frame,
     int tab_id,
     const GURL& top_url) const {
   // 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());
-
-  // Declarative user scripts use "page access" (from "permissions" section in
-  // manifest) whereas non-declarative user scripts use custom
-  // "content script access" logic.
-  if (is_declarative_) {
-    return extension->permissions_data()->GetPageAccess(
-        extension,
-        effective_document_url,
-        top_url,
-        tab_id,
-        -1,  // no process id
-        NULL /* ignore error */);
-  } else {
-    return extension->permissions_data()->GetContentScriptAccess(
-        extension,
-        effective_document_url,
-        top_url,
-        tab_id,
-        -1,  // no process id
-        NULL /* ignore error */);
-  }
+  return injection_host->CanExecuteOnFrame(
+      effective_document_url, top_url, tab_id, is_declarative_);
 }
 
 std::vector<blink::WebScriptSource> UserScriptInjector::GetJsSources(
     UserScript::RunLocation run_location) const {
   DCHECK_EQ(script_->run_location(), run_location);
 
   std::vector<blink::WebScriptSource> sources;
   const UserScript::FileList& js_scripts = script_->js_scripts();
   bool is_standalone_or_emulate_greasemonkey =
       script_->is_standalone() || script_->emulate_greasemonkey();
@@ skipping 53 matching lines @@
   }
 
   if (ShouldInjectCss(run_location))
     scripts_run_info->num_css += script_->css_scripts().size();
 }
 
 void UserScriptInjector::OnWillNotInject(InjectFailureReason reason) {
 }
 
 }  // namespace extensions