Add DataReductionProxy IPC to determine if the Data Reduction Proxy was used.

chrome/renderer/page_load_histograms.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 CHROME_RENDERER_PAGE_LOAD_HISTOGRAMS_H_
 #define CHROME_RENDERER_PAGE_LOAD_HISTOGRAMS_H_
 
 #include "base/basictypes.h"
-#include "components/data_reduction_proxy/core/common/data_reduction_proxy_params.h"
 #include "content/public/renderer/render_view_observer.h"
 
 namespace content {
 class DocumentState;
 }
 
 class PageLoadHistograms : public content::RenderViewObserver {
  public:
   explicit PageLoadHistograms(content::RenderView* render_view);
 
@@ skipping 19 matching lines @@
   //
   // It's possible for the request time not to be set, if a client
   // redirect had been done (the user never requested the page)
   // Also, it's possible to load a page without ever laying it out
   // so first_paint and first_paint_after_load can be 0.
   void Dump(blink::WebFrame* frame);
 
   void LogPageLoadTime(const content::DocumentState* load_times,
                        const blink::WebDataSource* ds) const;
 
-  data_reduction_proxy::DataReductionProxyParams data_reduction_proxy_params_;
-
   DISALLOW_COPY_AND_ASSIGN(PageLoadHistograms);
 };
 
 #endif  // CHROME_RENDERER_PAGE_LOAD_HISTOGRAMS_H_