startup: Put it in chrome namespace.

chrome/browser/ui/browser_list.h

Index: chrome/browser/ui/browser_list.h
diff --git a/chrome/browser/ui/browser_list.h b/chrome/browser/ui/browser_list.h
index e337b484e6f99bb0779285dc5cb95eec9fa3273d..494ffa58c62c80fc89694a66986490f24f8e121e 100644
--- a/chrome/browser/ui/browser_list.h
+++ b/chrome/browser/ui/browser_list.h
@@ -14,10 +14,6 @@
 class Browser;
 class Profile;
 
-namespace content {
-class WebContents;
-}
-
 namespace browser {
 class BrowserActivityObserver;
 #if defined(OS_MACOSX)
@@ -26,6 +22,9 @@ Browser* GetLastActiveBrowser();
 #if defined(TOOLKIT_GTK)
 class ExtensionInstallDialog;
 #endif
+}
+
+namespace chrome {
 namespace internal {
 void NotifyNotDefaultBrowserCallback();
 }
@@ -37,6 +36,10 @@ class ScreenLocker;
 }
 #endif
 
+namespace content {
+class WebContents;
+}
+
 #if defined(USE_ASH)
 content::WebContents* GetActiveWebContents();
 #endif
@@ -125,7 +128,7 @@ class BrowserList {
 #if defined(USE_ASH)
   friend content::WebContents* GetActiveWebContents();
 #endif
-  friend void browser::internal::NotifyNotDefaultBrowserCallback();
+  friend void chrome::internal::NotifyNotDefaultBrowserCallback();
   // DO NOT ADD MORE FRIENDS TO THIS LIST.
 
   // Returns the Browser object whose window was most recently active.  If the