Switch from WebDocument::insertStyleText to ::insertUserStyleSheet for programatic CSS injection.

chrome/renderer/extensions/user_script_idle_scheduler.cc

 // Copyright (c) 2011 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 "chrome/renderer/extensions/user_script_idle_scheduler.h"
 
 #include "base/message_loop.h"
 #include "chrome/common/extensions/extension_error_utils.h"
 #include "chrome/common/extensions/extension_messages.h"
 #include "chrome/renderer/extensions/extension_dispatcher.h"
 #include "chrome/renderer/extensions/extension_groups.h"
 #include "chrome/renderer/extensions/extension_helper.h"
 #include "chrome/renderer/extensions/user_script_slave.h"
 #include "content/renderer/render_view.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebString.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 
 namespace {
 // The length of time to wait after the DOM is complete to try and run user
 // scripts.
 const int kUserScriptIdleTimeoutMs = 200;
 }
 
+using WebKit::WebDocument;
 using WebKit::WebFrame;
 using WebKit::WebString;
 using WebKit::WebView;
 
 UserScriptIdleScheduler::UserScriptIdleScheduler(
     WebFrame* frame, ExtensionDispatcher* extension_dispatcher)
     : ALLOW_THIS_IN_INITIALIZER_LIST(method_factory_(this)),
       frame_(frame),
       has_run_(false),
       extension_dispatcher_(extension_dispatcher) {
@@ skipping 108 matching lines @@
         frame->executeScript(source);
       } else {
         std::vector<WebScriptSource> sources;
         sources.push_back(source);
         UserScriptSlave::InsertInitExtensionCode(&sources, params.extension_id);
         frame->executeScriptInIsolatedWorld(
             UserScriptSlave::GetIsolatedWorldId(extension, frame),
             &sources.front(), sources.size(), EXTENSION_GROUP_CONTENT_SCRIPTS);
       }
     } else {
-      frame->document().insertStyleText(
-          WebString::fromUTF8(params.code), WebString());
+      frame->document().insertUserStyleSheet(
+          WebString::fromUTF8(params.code),
+          // Author level is consistent with WebView::addUserStyleSheet.
+          WebDocument::UserStyleAuthorLevel);
     }
   }
 
   render_view->Send(new ExtensionHostMsg_ExecuteCodeFinished(
       render_view->routing_id(), params.request_id, true, ""));
 }
 
 bool UserScriptIdleScheduler::GetAllChildFrames(
     WebFrame* parent_frame,
     std::vector<WebFrame*>* frames_vector) const {
   if (!parent_frame)
     return false;
 
   for (WebFrame* child_frame = parent_frame->firstChild(); child_frame;
        child_frame = child_frame->nextSibling()) {
     frames_vector->push_back(child_frame);
     GetAllChildFrames(child_frame, frames_vector);
   }
   return true;
 }