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..1a310b22a3256c0055edf1a102263e8a511ac943 100644
--- a/chrome/browser/ui/views/toolbar/toolbar_button.cc
+++ b/chrome/browser/ui/views/toolbar/toolbar_button.cc
@@ -144,6 +144,8 @@ void ToolbarButton::OnMouseReleased(const ui::MouseEvent& event) {
   if (IsTriggerableEvent(event))
     show_menu_factory_.InvalidateWeakPtrs();
 
+  UpdateInkDropHoverState();
+
   if (!HitTestPoint(event.location()))
     ink_drop_animation_controller_->AnimateToState(views::InkDropState::HIDDEN);
 }
@@ -151,7 +153,13 @@ 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) {
+  UpdateInkDropHoverState();
+
   // 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.
@@ -214,6 +222,10 @@ ToolbarButton::CreateDefaultBorder() const {
   return border.Pass();
 }
 
+void ToolbarButton::OnEnabledChanged() {
+  UpdateInkDropHoverState();
+}
+
 void ToolbarButton::ShowContextMenuForView(View* source,
                                            const gfx::Point& point,
                                            ui::MenuSourceType source_type) {
@@ -329,6 +341,7 @@ void ToolbarButton::ShowDropDownMenu(ui::MenuSourceType source_type) {
 
   ink_drop_animation_controller_->AnimateToState(
       views::InkDropState::DEACTIVATED);
+  UpdateInkDropHoverState();
 
   menu_showing_ = false;
 
@@ -346,6 +359,10 @@ gfx::Point ToolbarButton::CalculateInkDropCenter() const {
   return GetLocalBounds().CenterPoint();
 }
 
+void ToolbarButton::UpdateInkDropHoverState() {
+  ink_drop_animation_controller_->SetHovered((enabled() && IsMouseHovered()));
+}
+
 const char* ToolbarButton::GetClassName() const {
   return "ToolbarButton";
 }