Fixees launcher tooltip animation settings and its finer visibility bugs.

ash/launcher/launcher_view.cc

Index: ash/launcher/launcher_view.cc
diff --git a/ash/launcher/launcher_view.cc b/ash/launcher/launcher_view.cc
index 21b173b4d9c719669dcb2dca06c41847b5af5eee..d277ad05f45f7d7ede797f6b9f6e55d522122f5d 100644
--- a/ash/launcher/launcher_view.cc
+++ b/ash/launcher/launcher_view.cc
@@ -752,6 +752,11 @@ bool LauncherView::ShouldHideTooltip(const gfx::Point& cursor_location) {
     if (child == overflow_button_)
       continue;
 
+    // The tooltip shouldn't show over the app-list window.
+    if (child == GetAppListButtonView() &&
+        Shell::GetInstance()->GetAppListWindow())
+      continue;
+
     gfx::Rect child_bounds = child->GetMirroredBounds();
     active_bounds = active_bounds.Union(child_bounds);
   }
@@ -954,13 +959,24 @@ void LauncherView::PointerReleasedOnButton(views::View* view,
 }
 
 void LauncherView::MouseMovedOverButton(views::View* view) {
+  // Mouse cursor moves doesn't make effects on the app-list button if
+  // app-list bubble is already visible.
+  if (view == GetAppListButtonView() &&
+      Shell::GetInstance()->GetAppListWindow())
+    return;
+
   if (!tooltip_->IsVisible())
     tooltip_->ResetTimer();
 }
 
 void LauncherView::MouseEnteredButton(views::View* view) {
+  // If mouse cursor enters to the app-list button but app-list bubble is
+  // already visible, we should not show the bubble in that case.
+  if (view == GetAppListButtonView() &&
+      Shell::GetInstance()->GetAppListWindow())
+    return;
+
   if (tooltip_->IsVisible()) {
-    tooltip_->Close();
     tooltip_->ShowImmediately(view, GetAccessibleName(view));
   } else {
     tooltip_->ShowDelayed(view, GetAccessibleName(view));
@@ -1018,6 +1034,7 @@ void LauncherView::ButtonPressed(views::Button* sender,
   if (view_index == -1)
     return;
 
+  tooltip_->Close();
   switch (model_->items()[view_index].type) {
     case TYPE_TABBED:
     case TYPE_APP_PANEL: