Refactor main URLRequestContext creation to use URLRequestContextBuilder

net/url_request/url_request_context.h

Index: net/url_request/url_request_context.h
diff --git a/net/url_request/url_request_context.h b/net/url_request/url_request_context.h
index 54bded29140cc909b8622ff6fa88124c0c876cba..ccd7ea10e11367be5af82540f649dcb3d378b7eb 100644
--- a/net/url_request/url_request_context.h
+++ b/net/url_request/url_request_context.h
@@ -41,6 +41,7 @@ class NetworkQualityEstimator;
 class SdchManager;
 class ProxyService;
 class URLRequest;
+class URLRequestContextStorage;
 class URLRequestJobFactory;
 class URLRequestThrottlerManager;
 
@@ -54,6 +55,8 @@ class NET_EXPORT URLRequestContext
   URLRequestContext();
   virtual ~URLRequestContext();
 
+  virtual URLRequestContextStorage* storage();
+
   // Copies the state from |other| into this context.
   void CopyFrom(const URLRequestContext* other);