Add a switch to emit browser histograms.

chrome/common/chrome_switches.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.
 
 // Defines all the command-line switches used by Chrome.
 
 #ifndef CHROME_COMMON_CHROME_SWITCHES_H_
 #define CHROME_COMMON_CHROME_SWITCHES_H_
 
 #include "build/build_config.h"
@@ skipping 140 matching lines @@
 extern const char kDisableTranslate[];
 extern const char kDisableTLSChannelID[];
 extern const char kDisableUserMediaSecurity[];
 extern const char kDisableWebGLDebugRendererInfo[];
 extern const char kDisableWebResources[];
 extern const char kDisableZeroBrowsersOpenForTests[];
 extern const char kDiskCacheDir[];
 extern const char kDiskCacheSize[];
 extern const char kDnsLogDetails[];
 extern const char kDnsPrefetchDisable[];
+extern const char kDumpBrowserHistograms[];
 extern const char kEmbedFlashFullscreen[];
 extern const char kEnableAdview[];
 extern const char kEnableAdviewSrcAttribute[];
 extern const char kEnableAppList[];
 extern const char kEnableAppWindowControls[];
 extern const char kEnableAppsShowOnFirstPaint[];
 extern const char kEnableAsyncDns[];
 extern const char kEnableAuthNegotiatePort[];
 extern const char kEnableAutologin[];
 extern const char kEnableBenchmarking[];
@@ skipping 298 matching lines @@
 #else
 extern const char kEnablePrintPreview[];
 #endif
 
 // DON'T ADD RANDOM STUFF HERE. Put it in the main section above in
 // alphabetical order, or in one of the ifdefs (also in order in each section).
 
 }  // namespace switches
 
 #endif  // CHROME_COMMON_CHROME_SWITCHES_H_