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

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index c754b139c5c14a3d1365be9ca5cf87d63637de9d..6ec6f25c181d9083bd417ab5963410637fe4eb4f 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -710,9 +710,6 @@ const char kForceFirstRun[]                 = "force-first-run";
 // prefixed with the character "t" will be treated as Trigger Variation Ids.
 const char kForceVariationIds[]             = "force-variation-ids";
 
-// Specifies an alternate URL to use for speaking to Google. Useful for testing.
-const char kGoogleBaseURL[]                 = "google-base-url";
-
 // Specifies a custom name for the GSSAPI library to load.
 const char kGSSAPILibraryName[]             = "gssapi-library-name";