Prevent showing multiple network config views.

chrome/browser/chromeos/options/network_config_view.h

Index: chrome/browser/chromeos/options/network_config_view.h
diff --git a/chrome/browser/chromeos/options/network_config_view.h b/chrome/browser/chromeos/options/network_config_view.h
index 438cd5177389aaa9b70cf6cf47dc91297876614d..9a860ab7ae7c5e8f1ab886ed9847f5828cfce54e 100644
--- a/chrome/browser/chromeos/options/network_config_view.h
+++ b/chrome/browser/chromeos/options/network_config_view.h
@@ -42,11 +42,10 @@ class NetworkConfigView : public views::DialogDelegateView,
      virtual ~Delegate() {}
   };
 
-  // Login dialog for known networks.
-  explicit NetworkConfigView(Network* network);
-  // Login dialog for new/hidden networks.
-  explicit NetworkConfigView(ConnectionType type);
-  virtual ~NetworkConfigView() {}
+  // Shows a network connection dialog if none is currently visible.
+  // Returns false if a dialog is already visible.
+  static bool Show(Network* network, gfx::NativeWindow parent);
+  static bool ShowForType(ConnectionType type, gfx::NativeWindow parent);
 
   // Returns corresponding native window.
   gfx::NativeWindow GetNativeWindow() const;
@@ -84,6 +83,12 @@ class NetworkConfigView : public views::DialogDelegateView,
                                     views::View* child) OVERRIDE;
 
  private:
+  // Login dialog for known networks.
+  explicit NetworkConfigView(Network* network);
+  // Login dialog for new/hidden networks.
+  explicit NetworkConfigView(ConnectionType type);
+  virtual ~NetworkConfigView();
+
   // Creates an "Advanced" button in the lower-left corner of the dialog.
   void CreateAdvancedButton();