Added the Material Design ink drop ripple effect to the navigation buttons in the browser toolbar.

chrome/browser/ui/views/toolbar/toolbar_button.h

Index: chrome/browser/ui/views/toolbar/toolbar_button.h
diff --git a/chrome/browser/ui/views/toolbar/toolbar_button.h b/chrome/browser/ui/views/toolbar/toolbar_button.h
index ebc113aa0a921b747a36d97d4bf6af1458642712..27257239e6b686f1d126faad0e64795d998ca94d 100644
--- a/chrome/browser/ui/views/toolbar/toolbar_button.h
+++ b/chrome/browser/ui/views/toolbar/toolbar_button.h
@@ -5,6 +5,7 @@
 #ifndef CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_BUTTON_H_
 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_BUTTON_H_
 
+#include "base/memory/scoped_ptr.h"
 #include "ui/views/context_menu_controller.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/button/label_button.h"
@@ -14,6 +15,7 @@ class MenuModel;
 }
 
 namespace views {
+class InkDropAnimationController;
 class MenuRunner;
 }
 
@@ -81,6 +83,9 @@ class ToolbarButton : public views::LabelButton,
   // Menu runner to display drop down menu.
   scoped_ptr<views::MenuRunner> menu_runner_;
 
+  // Animation controller for the ink drop ripple effect.
+  scoped_ptr<views::InkDropAnimationController> ink_drop_animation_controller_;
+
   // A factory for tasks that show the dropdown context menu for the button.
   base::WeakPtrFactory<ToolbarButton> show_menu_factory_;