Animate showing / hiding the location bar for bookmark apps.

chrome/browser/ui/views/location_bar/location_bar_view.cc

Index: chrome/browser/ui/views/location_bar/location_bar_view.cc
diff --git a/chrome/browser/ui/views/location_bar/location_bar_view.cc b/chrome/browser/ui/views/location_bar/location_bar_view.cc
index f5b111730951225a1c484bbe324921baf2720f9e..b2a7303f95278cae0a387304ddd111feb34de1a2 100644
--- a/chrome/browser/ui/views/location_bar/location_bar_view.cc
+++ b/chrome/browser/ui/views/location_bar/location_bar_view.cc
@@ -303,6 +303,9 @@ void LocationBarView::Init() {
   // Initialize the location entry. We do this to avoid a black flash which is
   // visible when the location entry has just been initialized.
   Update(NULL);
+
+  size_animation_.reset(new gfx::SlideAnimation(this));
+  size_animation_->Reset(1);
 }
 
 bool LocationBarView::IsInitialized() const {
@@ -526,6 +529,8 @@ gfx::Size LocationBarView::GetPreferredSize() const {
   if (!IsInitialized())
     return min_size;
 
+  min_size.set_height(min_size.height() * size_animation_->GetCurrentValue());
+
   // Compute width of omnibox-leading content.
   const int horizontal_edge_thickness = GetHorizontalEdgeThickness();
   int leading_width = horizontal_edge_thickness;
@@ -1064,6 +1069,18 @@ void LocationBarView::UpdateBookmarkStarVisibility() {
   }
 }
 
+void LocationBarView::UpdateLocationBarState(bool visible, bool animate) {
+  if (!animate) {
+    size_animation_->Reset(visible ? 1 : 0);
+    return;
+  }
+
+  if (visible)
+    size_animation_->Show();
+  else
+    size_animation_->Hide();
+}
+
 bool LocationBarView::ShowPageActionPopup(
     const extensions::Extension* extension,
     bool grant_tab_permissions) {
@@ -1294,6 +1311,16 @@ bool LocationBarView::CanStartDragForView(View* sender,
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+// LocationBarView, private gfx::AnimationDelegate implementation:
+void LocationBarView::AnimationProgressed(const gfx::Animation* animation) {
+  browser_->window()->ToolbarSizeChanged(true);
+}
+
+void LocationBarView::AnimationEnded(const gfx::Animation* animation) {
+  browser_->window()->ToolbarSizeChanged(false);
+}
+
+////////////////////////////////////////////////////////////////////////////////
 // LocationBarView, private OmniboxEditController implementation:
 
 void LocationBarView::OnChanged() {