mac: Prepare for -Wunused-functions.

chrome/browser/task_manager/task_manager.cc

Index: chrome/browser/task_manager/task_manager.cc
diff --git a/chrome/browser/task_manager/task_manager.cc b/chrome/browser/task_manager/task_manager.cc
index b062ec61444ec07adfed2cc7a063dd7af395347e..ca2f8b582d36e8d7ff385b507221d63c7386928a 100644
--- a/chrome/browser/task_manager/task_manager.cc
+++ b/chrome/browser/task_manager/task_manager.cc
@@ -154,23 +154,6 @@ void GetWinUSERHandles(base::ProcessHandle process,
 }
 #endif
 
-// Counts the number of extension background pages associated with this profile.
-int CountExtensionBackgroundPagesForProfile(Profile* profile) {
-  int count = 0;
-  ExtensionProcessManager* manager =
-      extensions::ExtensionSystem::Get(profile)->process_manager();
-  if (!manager)
-    return count;
-
-  const ExtensionProcessManager::ExtensionHostSet& background_hosts =
-      manager->background_hosts();
-  for (ExtensionProcessManager::const_iterator iter = background_hosts.begin();
-       iter != background_hosts.end(); ++iter) {
-    ++count;
-  }
-  return count;
-}
-
 }  // namespace
 
 class TaskManagerModelGpuDataManagerObserver