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

content/common/view_messages.h

Index: content/common/view_messages.h
diff --git a/content/common/view_messages.h b/content/common/view_messages.h
index 5d4d20277956dd8e2d8deccbee155aa5452158ca..83e01079c55f2adf9e8212f429b5cb8431cb6895 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -618,6 +618,14 @@ IPC_STRUCT_BEGIN(ViewMsg_Navigate_Params)
   // The URL to load.
   IPC_STRUCT_MEMBER(GURL, url)
 
+  // Base URL for using in WebKit's SubstituteData.
+  // Is only used with data: URLs.
+  IPC_STRUCT_MEMBER(GURL, base_url_for_data)
+
+  // History URL for using in WebKit's SubstituteData.
+  // Is only used with data: URLs.
+  IPC_STRUCT_MEMBER(GURL, history_url_for_data)
+
   // The URL to send in the "Referer" header field. Can be empty if there is
   // no referrer.
   IPC_STRUCT_MEMBER(content::Referrer, referrer)