Makes the maximize/restore button handling

ash/launcher/launcher_button.cc

Index: ash/launcher/launcher_button.cc
diff --git a/ash/launcher/launcher_button.cc b/ash/launcher/launcher_button.cc
index b9f50004255b3b6cae1a72e994c142596cb5b068..2963c9fc6be6bc12553b8f145af87e919e110a0a 100644
--- a/ash/launcher/launcher_button.cc
+++ b/ash/launcher/launcher_button.cc
@@ -140,6 +140,10 @@ void LauncherButton::ClearState(State state) {
   }
 }
 
+gfx::Rect LauncherButton::GetIconBounds() const {
+  return icon_view_->bounds();
+}
+
 bool LauncherButton::OnMousePressed(const views::MouseEvent& event) {
   CustomButton::OnMousePressed(event);
   host_->MousePressedOnButton(this, event);