Revert 180055: Very likely caused http://crbug.com/173885

chrome/common/url_constants.cc

 // 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.
 
 #include "chrome/common/url_constants.h"
 
 #include "googleurl/src/url_util.h"
 
 namespace chrome {
 
@@ skipping 177 matching lines @@
 const char kChromeUIStatsHost[] = "stats";
 const char kChromeUISyncHost[] = "sync";
 const char kChromeUISyncInternalsHost[] = "sync-internals";
 const char kChromeUISyncPromoHost[] = "signin";
 const char kChromeUISyncResourcesHost[] = "syncresources";
 const char kChromeUITaskManagerHost[] = "tasks";
 const char kChromeUITermsHost[] = "terms";
 const char kChromeUIThemeHost[] = "theme";
 const char kChromeUIThumbnailHost[] = "thumb";
 const char kChromeUITouchIconHost[] = "touch-icon";
+const char kChromeUITracingHost[] = "tracing";
 const char kChromeUIUberFrameHost[] = "uber-frame";
 const char kChromeUIUberHost[] = "chrome";
 const char kChromeUIUserActionsHost[] = "user-actions";
 const char kChromeUIVersionHost[] = "version";
 const char kChromeUIWorkersHost[] = "workers";
 
 const char kChromeUIScreenshotPath[] = "screenshots";
 const char kChromeUIThemePath[] = "theme";
 
 #if defined(OS_ANDROID)
@@ skipping 303 matching lines @@
 const char kChromeSearchScheme[] = "chrome-search";
 
 // Google SafeSearch query parameters.
 const char kSafeSearchSafeParameter[] = "safe=active";
 const char kSafeSearchSsuiParameter[] = "ssui=on";
 
 const char kMediaAccessLearnMoreUrl[] =
     "https://support.google.com/chrome/?p=ib_access_cam_mic";
 
 }  // namespace chrome