Attempt 3 at: Splits ChromeURLDataManager into 2 chunks:...

chrome/browser/net/chrome_url_request_context.h

Index: chrome/browser/net/chrome_url_request_context.h
===================================================================
--- chrome/browser/net/chrome_url_request_context.h	(revision 74394)
+++ chrome/browser/net/chrome_url_request_context.h	(working copy)
@@ -40,6 +40,7 @@
 class NetworkDelegate;
 }
 
+class ChromeURLDataManagerBackend;
 class ChromeURLRequestContext;
 class ChromeURLRequestContextFactory;
 
@@ -102,6 +103,8 @@
     return prerender_manager_.get();
   }
 
+  ChromeURLDataManagerBackend* GetChromeURLDataManagerBackend();
+
  protected:
   virtual ~ChromeURLRequestContext();
 
@@ -191,6 +194,7 @@
   scoped_refptr<ExtensionInfoMap> extension_info_map_;
   scoped_refptr<ExtensionIOEventRouter> extension_io_event_router_;
   scoped_refptr<PrerenderManager> prerender_manager_;
+  scoped_ptr<ChromeURLDataManagerBackend> chrome_url_data_manager_backend_;
 
   bool is_off_the_record_;