PlzNavigate: Create the speculative renderer earlier.

content/browser/frame_host/navigation_request.h

 // Copyright 2014 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.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_NAVIGATION_REQUEST_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_REQUEST_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 36 matching lines @@
     // The response started on the IO thread and is ready to be committed. This
     // is one of the two final states for the request.
     RESPONSE_STARTED,
 
     // The request failed on the IO thread and an error page should be
     // displayed. This is one of the two final states for the request.
     FAILED,
   };
 
   // Helper function to determine if the navigation request to |url| should be
-  // sent to the network stack.
+  // sent to the network stack. It will not be sent for data URLs or JavaScript
+  // URLs, cases where no network request needs to be made.
   static bool ShouldMakeNetworkRequest(const GURL& url);
 
   // Creates a request for a browser-intiated navigation.
   static scoped_ptr<NavigationRequest> CreateBrowserInitiated(
       FrameTreeNode* frame_tree_node,
       const NavigationEntryImpl& entry,
       FrameMsg_Navigate_Type::Value navigation_type,
       base::TimeTicks navigation_start,
       NavigationControllerImpl* controller);
 
@@ skipping 98 matching lines @@
   NavigationEntryImpl::RestoreType restore_type_;
   bool is_view_source_;
   int bindings_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationRequest);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_REQUEST_H_