Remove media_galleries_handlers - not used.

According to crbug.com/307827 - the code that used media_galleries_handlers has been removed.

BUG=NONE
NOTRY=true

Review URL: https://codereview.chromium.org/338473003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@277773 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/extensions/browser/extension_function_histogram_value.h b/extensions/browser/extension_function_histogram_value.h
index 388a1133..e764408 100644
--- a/extensions/browser/extension_function_histogram_value.h
+++ b/extensions/browser/extension_function_histogram_value.h
@@ -495,7 +495,7 @@
   WALLPAPERPRIVATE_SETCUSTOMWALLPAPERLAYOUT,
   DOWNLOADSINTERNAL_DETERMINEFILENAME,
   SYNCFILESYSTEM_GETFILESYNCSTATUSES,
-  MEDIAGALLERIESPRIVATE_GETHANDLERS,
+  DELETED_MEDIAGALLERIESPRIVATE_GETHANDLERS,
   WALLPAPERPRIVATE_RESETWALLPAPER,
   DEVELOPERPRIVATE_PERMISSIONS,
   WEBSTOREPRIVATE_ENABLEAPPLAUNCHER,