chrome: Use stl utilities from the base namespace

chrome/browser/extensions/extension_icon_manager.cc

Index: chrome/browser/extensions/extension_icon_manager.cc
diff --git a/chrome/browser/extensions/extension_icon_manager.cc b/chrome/browser/extensions/extension_icon_manager.cc
index cec9a5bda615b201c4eb7a486b35b7111a3cf05e..ae163be40dc00342c241a11c7fda86a3afe26802 100644
--- a/chrome/browser/extensions/extension_icon_manager.cc
+++ b/chrome/browser/extensions/extension_icon_manager.cc
@@ -79,7 +79,7 @@ void ExtensionIconManager::LoadIcon(content::BrowserContext* context,
 
 const SkBitmap& ExtensionIconManager::GetIcon(const std::string& extension_id) {
   const SkBitmap* result = NULL;
-  if (ContainsKey(icons_, extension_id)) {
+  if (base::ContainsKey(icons_, extension_id)) {
     result = &icons_[extension_id];
   } else {
     EnsureDefaultIcon();
@@ -103,7 +103,7 @@ void ExtensionIconManager::OnImageLoaded(const std::string& extension_id,
 
   // We may have removed the icon while waiting for it to load. In that case,
   // do nothing.
-  if (!ContainsKey(pending_icons_, extension_id))
+  if (!base::ContainsKey(pending_icons_, extension_id))
     return;
 
   pending_icons_.erase(extension_id);