Make NavigationParams clearer

content/renderer/render_view_impl.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.
 
 #ifndef CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 58 matching lines @@
 #if defined(COMPILER_MSVC)
 // RenderViewImpl is a diamond-shaped hierarchy, with WebWidgetClient at the
 // root. VS warns when we inherit the WebWidgetClient method implementations
 // from RenderWidget.  It's safe to ignore that warning.
 #pragma warning(disable: 4250)
 #endif
 
 class PepperDeviceTest;
 class SkBitmap;
 struct PP_NetAddress_Private;
-struct FrameMsg_Navigate_Params;
 struct ViewMsg_New_Params;
 struct ViewMsg_PostMessage_Params;
 struct ViewMsg_Resize_Params;
 struct ViewMsg_StopFinding_Params;
 
 namespace base {
 class CommandLine;
 }
 
 namespace blink {
@@ skipping 952 matching lines @@
   // use the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_