Replace BrowserProces::AddRefModule/RemoveModule by ScopedKeepAlive

chrome/browser/ui/browser.h

Index: chrome/browser/ui/browser.h
diff --git a/chrome/browser/ui/browser.h b/chrome/browser/ui/browser.h
index f9a8392127cb2cdbf889d79ed05021e9ed1a1caa..c4ed825e11447af4ad853b1efa428b7fad40bf58 100644
--- a/chrome/browser/ui/browser.h
+++ b/chrome/browser/ui/browser.h
@@ -66,6 +66,7 @@ class BrowserWindow;
 class FindBarController;
 class PrefService;
 class Profile;
+class ScopedKeepAlive;
 class SearchDelegate;
 class SearchModel;
 class StatusBubble;
@@ -417,6 +418,12 @@ class Browser : public TabStripModelObserver,
   // flow.
   void ShowModalSyncConfirmationWindow();
 
+  // Used to register a KeepAlive to affect the Chrome lifetime. The KeepAlive
+  // is registered when the browser is added to the browser list, and unregisted
+  // when it is removed from it.
+  void RegisterKeepAlive();
+  void UnregisterKeepAlive();
+
   // Interface implementations ////////////////////////////////////////////////
 
   // Overridden from content::PageNavigator:
@@ -998,6 +1005,8 @@ class Browser : public TabStripModelObserver,
 
   SigninViewController signin_view_controller_;
 
+  scoped_ptr<ScopedKeepAlive> keep_alive_;
+
   // The following factory is used for chrome update coalescing.
   base::WeakPtrFactory<Browser> chrome_updater_factory_;