Add a new GetInstance() method for singleton classes used in chrome/browser files.

chrome/browser/translate/translate_manager.h

Index: chrome/browser/translate/translate_manager.h
diff --git a/chrome/browser/translate/translate_manager.h b/chrome/browser/translate/translate_manager.h
index 70504844f5870f98713176e28f95cbc62c0b5776..fbaa181b8834c1cc9c79209a051b626343219728 100644
--- a/chrome/browser/translate/translate_manager.h
+++ b/chrome/browser/translate/translate_manager.h
@@ -34,6 +34,9 @@ class TranslateInfoBarDelegate;
 class TranslateManager : public NotificationObserver,
                          public URLFetcher::Delegate {
  public:
+  // Returns the singleton instance.
+  static TranslateManager* GetInstance();
+
   virtual ~TranslateManager();
 
   // Translates the page contents from |source_lang| to |target_lang|.