Auto open and close the palette on an eject event.

ash/common/system/chromeos/palette/palette_tray.cc

Index: ash/common/system/chromeos/palette/palette_tray.cc
diff --git a/ash/common/system/chromeos/palette/palette_tray.cc b/ash/common/system/chromeos/palette/palette_tray.cc
index 95db0eb52129b14519923333ddcda48946a8de90..b47ed1900bf025112871158848dafd07149bf4af 100644
--- a/ash/common/system/chromeos/palette/palette_tray.cc
+++ b/ash/common/system/chromeos/palette/palette_tray.cc
@@ -4,10 +4,12 @@
 
 #include "ash/common/system/chromeos/palette/palette_tray.h"
 
+#include "ash/common/palette_delegate.h"
 #include "ash/common/shelf/shelf_constants.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/shelf/wm_shelf_util.h"
 #include "ash/common/shell_window_ids.h"
+#include "ash/common/system/chromeos/palette/eject_controller.h"
 #include "ash/common/system/chromeos/palette/palette_tool_manager.h"
 #include "ash/common/system/chromeos/palette/palette_utils.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
@@ -118,6 +120,9 @@ class TitleView : public views::View, public views::ButtonListener {
 PaletteTray::PaletteTray(WmShelf* wm_shelf)
     : TrayBackgroundView(wm_shelf),
       palette_tool_manager_(new PaletteToolManager(this)) {
+  eject_controller_.reset(new EjectController(
+      base::Bind(&PaletteTray::OnEject, base::Unretained(this))));
+
   PaletteTool::RegisterToolInstances(palette_tool_manager_.get());
 
   SetContentsBackground();
@@ -308,6 +313,17 @@ void PaletteTray::UpdateTrayIcon() {
   icon_->SetImage(CreateVectorIcon(icon, kShelfIconColor));
 }
 
+void PaletteTray::OnEject(bool eject) {
+  if (!WmShell::Get()->palette_delegate()->ShouldAutoOpenPalette())
+    return;
+
+  if (eject && !bubble_)
+    OpenBubble();
+
+  if (!eject && bubble_)
+    HidePalette();
+}
+
 void PaletteTray::UpdateIconVisibility() {
   if (!IsPaletteEnabled())
     return;