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

content/common/view_messages.h

 // 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.
 
 // IPC messages for page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/process.h"
 #include "base/shared_memory.h"
 #include "content/common/common_param_traits.h"
@@ skipping 937 matching lines @@
 // client can uniquely identify the request.
 IPC_MESSAGE_ROUTED4(ViewMsg_ScriptEvalRequest,
                     string16,  /* frame_xpath */
                     string16,  /* jscript_url */
                     int,  /* ID */
                     bool  /* If true, result is sent back. */)
 
 // Request for the renderer to evaluate an xpath to a frame and insert css
 // into that frame's document. See ViewMsg_ScriptEvalRequest for details on
 // allowed xpath expressions.
-IPC_MESSAGE_ROUTED3(ViewMsg_CSSInsertRequest,
+IPC_MESSAGE_ROUTED2(ViewMsg_CSSInsertRequest,
                     std::wstring,  /* frame_xpath */
-                    std::string,  /* css string */
-                    std::string  /* element id */)
+                    std::string  /* css string */)
 
 // External popup menus.
 IPC_MESSAGE_ROUTED1(ViewMsg_SelectPopupMenuItem,
                     int /* selected index, -1 means no selection */)
 
 // Change the zoom level for the current main frame.  If the level actually
 // changes, a ViewHostMsg_DidZoomURL message will be sent back to the browser
 // telling it what url got zoomed and what its current zoom level is.
 IPC_MESSAGE_ROUTED1(ViewMsg_Zoom,
                     PageZoom::Function /* function */)
@@ skipping 1002 matching lines @@
 
 // Provide the browser process with current renderer framerate.
 IPC_MESSAGE_CONTROL2(ViewHostMsg_FPS,
                      int /* routing id */,
                      float /* frames per second */)
 
 // Notifies the browser that the page was or was not saved as MHTML.
 IPC_MESSAGE_CONTROL2(ViewHostMsg_SavedPageAsMHTML,
                      int /* job_id */,
                      bool /* success */)