Adding DRP specfic UMA for FirstContentfulPaint

content/public/test/test_renderer_host.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_PUBLIC_TEST_TEST_RENDERER_HOST_H_
 #define CONTENT_PUBLIC_TEST_TEST_RENDERER_HOST_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 223 matching lines @@
   void SetContents(WebContents* contents);
 
   // Creates a new test-enabled WebContents. Ownership passes to the
   // caller.
   WebContents* CreateTestWebContents();
 
   // Cover for |contents()->NavigateAndCommit(url)|. See
   // WebContentsTester::NavigateAndCommit for details.
   void NavigateAndCommit(const GURL& url);
 
+  void SetSimulateUsedDataReductionProxy(bool enabled);
+
   // Simulates a reload of the current page.
   void Reload();
   void FailedReload();
 
  protected:
   // testing::Test
   void SetUp() override;
   void TearDown() override;
 
   // Derived classes should override this method to use a custom BrowserContext.
@@ skipping 34 matching lines @@
   scoped_ptr<aura::test::AuraTestHelper> aura_test_helper_;
 #endif
   RenderViewHostTestEnabler rvh_test_enabler_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostTestHarness);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_TEST_RENDERER_HOST_H_