views: Get rid of DoShowAboutChromeDialog() function.

chrome/browser/ui/views/browser_dialogs.h

Index: chrome/browser/ui/views/browser_dialogs.h
diff --git a/chrome/browser/ui/views/browser_dialogs.h b/chrome/browser/ui/views/browser_dialogs.h
index 12dce4d05324cb6e64d9d41bde56b898ec825f73..1848a945b18d9a9cff5b4b763f7d554fe3c4be39 100644
--- a/chrome/browser/ui/views/browser_dialogs.h
+++ b/chrome/browser/ui/views/browser_dialogs.h
@@ -40,7 +40,6 @@ class Size;
 
 namespace views {
 class View;
-class Widget;
 }
 
 namespace browser {
@@ -67,8 +66,7 @@ void ShowPageInfoBubble(views::View* anchor_view,
                         content::PageNavigator* navigator);
 
 // Shows the about dialog. See AboutChromeView.
-views::Widget* ShowAboutChromeView(gfx::NativeWindow parent,
-                                   Profile* profile);
+void ShowAboutChromeView(gfx::NativeWindow parent, Profile* profile);
 
 // Creates and returns a find bar for the given browser window. See FindBarWin.
 FindBar* CreateFindBar(BrowserView* browser_view);