mash: Break ash system tray dependencies on ash::ShelfWidget

ash/mus/bridge/wm_shelf_mus.cc

Index: ash/mus/bridge/wm_shelf_mus.cc
diff --git a/ash/mus/bridge/wm_shelf_mus.cc b/ash/mus/bridge/wm_shelf_mus.cc
index ffee9680c1a2c49f694bdac55ef5088426f3c23c..5152250f909d39c677e826e0f54bf2dab598fbe9 100644
--- a/ash/mus/bridge/wm_shelf_mus.cc
+++ b/ash/mus/bridge/wm_shelf_mus.cc
@@ -55,11 +55,25 @@ ShelfAutoHideState WmShelfMus::GetAutoHideState() const {
   return SHELF_AUTO_HIDE_HIDDEN;
 }
 
+void WmShelfMus::UpdateAutoHideState() {
+  NOTIMPLEMENTED();
+}
+
 ShelfBackgroundType WmShelfMus::GetBackgroundType() const {
   NOTIMPLEMENTED();
   return SHELF_BACKGROUND_DEFAULT;
 }
 
+bool WmShelfMus::IsDimmed() const {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool WmShelfMus::IsVisible() const {
+  NOTIMPLEMENTED();
+  return true;
+}
+
 void WmShelfMus::UpdateVisibilityState() {
   NOTIMPLEMENTED();
 }
@@ -78,11 +92,24 @@ void WmShelfMus::UpdateIconPositionForWindow(WmWindow* window) {
   NOTIMPLEMENTED();
 }
 
+gfx::Rect WmShelfMus::GetIdealBounds() {
+  NOTIMPLEMENTED();
+  return gfx::Rect();
+}
+
 gfx::Rect WmShelfMus::GetScreenBoundsOfItemIconForWindow(WmWindow* window) {
   NOTIMPLEMENTED();
   return gfx::Rect();
 }
 
+void WmShelfMus::UpdateAutoHideForMouseEvent(ui::MouseEvent* event) {
+  NOTIMPLEMENTED();
+}
+
+void WmShelfMus::UpdateAutoHideForGestureEvent(ui::GestureEvent* event) {
+  NOTIMPLEMENTED();
+}
+
 void WmShelfMus::AddObserver(WmShelfObserver* observer) {
   observers_.AddObserver(observer);
 }