[OriginChip] Add animations for the hiding and showing of the chip.

chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_service.h"
@@ skipping 574 matching lines @@
     gfx::Rect bounds(NSRectToCGRect([field_ frame]));
     instant_service->OnOmniboxStartMarginChanged(bounds.x());
   }
 }
 
 void LocationBarViewMac::OnSetFocus() {
   // Update the keyword and search hint states.
   OnChanged();
 }
 
+void LocationBarViewMac::ShowURL() {
+  omnibox_view_->ShowURL();
+}
+
+void LocationBarViewMac::HideURLAndShowOriginChip() {

[groby-ooo-7-16, 2014/03/20 23:38:53]

Since the counterpart is just ShowURL, maybe we should keep the name 'HideURL'.
I'm leery of anything with "And" in the function name, anyways.

[Justin Donnelly, 2014/03/21 21:15:57]

Done.

+  omnibox_view_->HideURL();
+}
+
 InstantController* LocationBarViewMac::GetInstant() {
   return browser_->instant_controller() ?
       browser_->instant_controller()->instant() : NULL;
 }
 
 WebContents* LocationBarViewMac::GetWebContents() {
   return browser_->tab_strip_model()->GetActiveWebContents();
 }
 
 ToolbarModel* LocationBarViewMac::GetToolbarModel() {
@@ skipping 193 matching lines @@
 }
 
 bool LocationBarViewMac::UpdateMicSearchDecorationVisibility() {
   bool is_visible = !GetToolbarModel()->input_in_progress() &&
                     browser_->search_model()->voice_search_supported();
   if (mic_search_decoration_->IsVisible() == is_visible)
     return false;
   mic_search_decoration_->SetVisible(is_visible);
   return true;
 }