Migrate content/ files to histogram_macros.h includes.

content/renderer/media/android/media_info_loader.cc

 // Copyright 2013 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.
 
 #include "content/renderer/media/android/media_info_loader.h"
 
 #include <utility>
 
 #include "base/bits.h"
 #include "base/callback_helpers.h"
-#include "base/metrics/histogram.h"
+#include "base/metrics/histogram_macros.h"
 #include "third_party/WebKit/public/platform/WebURLError.h"
 #include "third_party/WebKit/public/platform/WebURLLoader.h"
 #include "third_party/WebKit/public/platform/WebURLResponse.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 
 using blink::WebFrame;
 using blink::WebURLError;
 using blink::WebURLLoader;
 using blink::WebURLLoaderOptions;
 using blink::WebURLRequest;
@@ skipping 185 matching lines @@
 void MediaInfoLoader::DidBecomeReady(Status status) {
   UMA_HISTOGRAM_TIMES("Media.InfoLoadDelay",
                       base::TimeTicks::Now() - start_time_);
   active_loader_.reset();
   if (!ready_cb_.is_null())
     base::ResetAndReturn(&ready_cb_).Run(status, url_, first_party_url_,
                                          allow_stored_credentials_);
 }
 
 }  // namespace content