Implemented inline login dialog for Chrome OS.

ui/web_dialogs/web_dialog_delegate.h

Index: ui/web_dialogs/web_dialog_delegate.h
diff --git a/ui/web_dialogs/web_dialog_delegate.h b/ui/web_dialogs/web_dialog_delegate.h
index aa9b14c0f5f21c9034fe0f628d4e7e279193aa9f..ccfd26ef98287f8e292653cf30d97d2d59d672b5 100644
--- a/ui/web_dialogs/web_dialog_delegate.h
+++ b/ui/web_dialogs/web_dialog_delegate.h
@@ -69,6 +69,10 @@ class WEB_DIALOGS_EXPORT WebDialogDelegate {
   // agreement, etc.
   virtual bool CanCloseDialog() const;
 
+  // Returns true if the dialog can ever be resized. Default implementation
+  // returns |true|.
+  virtual bool CanResizeDialog() const;
+
   // A callback to notify the delegate that |source|'s loading state has
   // changed.
   virtual void OnLoadingStateChanged(content::WebContents* source) {}