Added material design mouse hover feedback support.

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

Index: chrome/browser/ui/views/toolbar/toolbar_button.cc
diff --git a/chrome/browser/ui/views/toolbar/toolbar_button.cc b/chrome/browser/ui/views/toolbar/toolbar_button.cc
index 33cfcd013c9dc9d0e64e3a372ebb59925614c3ab..95d9ebf0eed0cea2196e100265920aad144e2551 100644
--- a/chrome/browser/ui/views/toolbar/toolbar_button.cc
+++ b/chrome/browser/ui/views/toolbar/toolbar_button.cc
@@ -34,7 +34,7 @@ ToolbarButton::ToolbarButton(views::ButtonListener* listener,
       y_position_on_lbuttondown_(0),
       ink_drop_animation_controller_(
           views::InkDropAnimationControllerFactory::
-              CreateInkDropAnimationController(this)),
+              CreateInkDropAnimationController(this, this)),
       show_menu_factory_(this) {
   set_context_menu_controller(this);
 
@@ -151,12 +151,18 @@ void ToolbarButton::OnMouseReleased(const ui::MouseEvent& event) {
 void ToolbarButton::OnMouseCaptureLost() {
 }
 
+void ToolbarButton::OnMouseEntered(const ui::MouseEvent& event) {
+  UpdateInkDropHoverState();
+}
+
 void ToolbarButton::OnMouseExited(const ui::MouseEvent& event) {
   // Starting a drag results in a MouseExited, we need to ignore it.
   // A right click release triggers an exit event. We want to
   // remain in a PUSHED state until the drop down menu closes.
   if (state_ != STATE_DISABLED && !InDrag() && state_ != STATE_PRESSED)
     SetState(STATE_NORMAL);
+
+  UpdateInkDropHoverState();
 }
 
 void ToolbarButton::OnGestureEvent(ui::GestureEvent* event) {
@@ -214,6 +220,10 @@ ToolbarButton::CreateDefaultBorder() const {
   return border.Pass();
 }
 
+void ToolbarButton::OnEnabledChanged() {
+  UpdateInkDropHoverState();
+}
+
 void ToolbarButton::ShowContextMenuForView(View* source,
                                            const gfx::Point& point,
                                            ui::MenuSourceType source_type) {
@@ -346,6 +356,10 @@ gfx::Point ToolbarButton::CalculateInkDropCenter() const {
   return GetLocalBounds().CenterPoint();
 }
 
+void ToolbarButton::UpdateInkDropHoverState() {
+  ink_drop_animation_controller_->SetHovered(ShouldShowInkDropHover());
+}
+
 const char* ToolbarButton::GetClassName() const {
   return "ToolbarButton";
 }