GTK: Remove the global bookmark menu code. It's been behind a flag and bitrotting.

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 42232e37f416208ddf5789347a5a02ad7a607cbb..4ec64c18c8824704c7a6f21d24cd40c513409c7c 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1192,14 +1192,6 @@ const char kUseMockKeychain[]               = "use-mock-keychain";
 const char kKioskMode[]                     = "kiosk";
 #endif
 
-#if defined(TOOLKIT_GTK)
-// Enables the global bookmark menu in our global menu bar on Ubuntu
-// Natty. This is disabled because of issues where dbus will hang for over a
-// minute because it doesn't like it when we thrown hundreds of kilobytes (or
-// even megabytes) of favicon data at it.
-const char kEnableGlobalBookmarkMenu[]     = "enable-global-bookmark-menu";
-#endif
-
 #if defined(TOOLKIT_VIEWS)
 // Enables debug paint in views framework. Enabling this causes the damaged
 // region being painted to flash in red.