chrome: Use stl utilities from the base namespace

chrome/browser/predictors/resource_prefetcher_manager.cc

Index: chrome/browser/predictors/resource_prefetcher_manager.cc
diff --git a/chrome/browser/predictors/resource_prefetcher_manager.cc b/chrome/browser/predictors/resource_prefetcher_manager.cc
index 822935ea857f2ed8e09f4e2624ce7d1f4797bd27..69c8bfc165ff0784f46decd17e3b466021cc451e 100644
--- a/chrome/browser/predictors/resource_prefetcher_manager.cc
+++ b/chrome/browser/predictors/resource_prefetcher_manager.cc
@@ -46,8 +46,8 @@ void ResourcePrefetcherManager::ShutdownOnUIThread() {
 
 void ResourcePrefetcherManager::ShutdownOnIOThread() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
-  STLDeleteContainerPairSecondPointers(prefetcher_map_.begin(),
-                                       prefetcher_map_.end());
+  base::STLDeleteContainerPairSecondPointers(prefetcher_map_.begin(),
+                                             prefetcher_map_.end());
 }
 
 void ResourcePrefetcherManager::MaybeAddPrefetch(
@@ -59,7 +59,7 @@ void ResourcePrefetcherManager::MaybeAddPrefetch(
   // Don't add a duplicate prefetch for the same host or URL.
   std::string key = key_type == PREFETCH_KEY_TYPE_HOST ?
       navigation_id.main_frame_url.host() : navigation_id.main_frame_url.spec();
-  if (ContainsKey(prefetcher_map_, key))
+  if (base::ContainsKey(prefetcher_map_, key))
     return;
 
   ResourcePrefetcher* prefetcher = new ResourcePrefetcher(