Add an ability to call WebKit's WebFrame::loadData via NavigationController.

content/common/view_messages.h

 // Copyright (c) 2012 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/content_export.h"
@@ skipping 599 matching lines @@
   IPC_STRUCT_MEMBER(int, pending_history_list_offset)
 
   // Informs the RenderView of where its current page contents reside in
   // session history and the total size of the session history list.
   IPC_STRUCT_MEMBER(int, current_history_list_offset)
   IPC_STRUCT_MEMBER(int, current_history_list_length)
 
   // The URL to load.
   IPC_STRUCT_MEMBER(GURL, url)
 
+  // Base URL for using in WebKit's SubstituteData.

[Charlie Reis, 2012/06/18 18:34:29]

Please mention that these two are only needed for navigations to data URLs.

[mnaganov (inactive), 2012/06/19 12:52:32]

Renamed to base_url_for_data

+  IPC_STRUCT_MEMBER(GURL, base_url)
+
+  // History URL for using in WebKit's SubstituteData.

[Charlie Reis, 2012/06/18 18:34:29]

Again, display_url seems to convey what it's being used for more clearly. 
Either way, it's important to note that it's only used for data URLs, since it
could easily be interpreted as applying to all navigations.

[mnaganov (inactive), 2012/06/19 12:52:32]

Changed to history_url_for_data

+  IPC_STRUCT_MEMBER(GURL, history_url)
+
   // The URL to send in the "Referer" header field. Can be empty if there is
   // no referrer.
   IPC_STRUCT_MEMBER(content::Referrer, referrer)
 
   // The type of transition.
   IPC_STRUCT_MEMBER(content::PageTransition, transition)
 
   // Opaque history state (received by ViewHostMsg_UpdateState).
   IPC_STRUCT_MEMBER(std::string, state)
 
@@ skipping 1477 matching lines @@
 // (according to the value of is_hung). The browser can give the user the
 // option of killing the plugin.
 IPC_MESSAGE_ROUTED3(ViewHostMsg_PepperPluginHung,
                     int /* plugin_child_id */,
                     FilePath /* path */,
                     bool /* is_hung */)
 
 // Screen was rotated. Dispatched to the onorientationchange javascript API.
 IPC_MESSAGE_ROUTED1(ViewMsg_OrientationChangeEvent,
                     int /* orientation */)