Eliminate GoogleURLTracker's dependence on //chrome-level switches

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 186 matching lines @@
 extern const char kExtensionsNotWebstore[];
 extern const char kExtensionsUpdateFrequency[];
 extern const char kExtraSearchQueryParams[];
 extern const char kFakeVariationsChannel[];
 extern const char kFastStart[];
 extern const char kFlagSwitchesBegin[];
 extern const char kFlagSwitchesEnd[];
 extern const char kForceAppMode[];
 extern const char kForceFirstRun[];
 extern const char kForceVariationIds[];
-extern const char kGoogleBaseURL[];
 extern const char kGSSAPILibraryName[];
 extern const char kHelp[];
 extern const char kHelpShort[];
 extern const char kHideIcons[];
 extern const char kHistoryEnableGroupByDomain[];
 extern const char kHistoryWebHistoryUrl[];
 extern const char kHomePage[];
 extern const char kHostRules[];
 extern const char kHostResolverParallelism[];
 extern const char kHostResolverRetryAttempts[];
@@ skipping 185 matching lines @@
 #ifndef NDEBUG
 extern const char kFileManagerExtensionPath[];
 #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_