Add OnDisplayMetricsChanged in DisplayObserver.

ui/message_center/views/toast_contents_view.cc

Index: ui/message_center/views/toast_contents_view.cc
diff --git a/ui/message_center/views/toast_contents_view.cc b/ui/message_center/views/toast_contents_view.cc
index d004e57f2ad3de379b7592496982efb3c1e1b4a6..de4fb5d9561611e1dc4b8c1ac554b6bb75dc2388 100644
--- a/ui/message_center/views/toast_contents_view.cc
+++ b/ui/message_center/views/toast_contents_view.cc
@@ -28,6 +28,8 @@
 #include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
 #endif
 
+using gfx::Screen;
+
 namespace message_center {
 namespace {
 
@@ -247,8 +249,10 @@ void ToastContentsView::OnDisplayChanged() {
   if (!native_view || !collection_.get())
     return;
 
-  collection_->OnDisplayBoundsChanged(gfx::Screen::GetScreenFor(
-      native_view)->GetDisplayNearestWindow(native_view));
+  collection_->OnDisplayMetricsChanged(
+      Screen::GetScreenFor(native_view)->GetDisplayNearestWindow(native_view),
+      gfx::DisplayObserver::DISPLAY_METRIC_BOUNDS |
+          gfx::DisplayObserver::DISPLAY_METRIC_WORK_AREA);
 }
 
 void ToastContentsView::OnWorkAreaChanged() {
@@ -260,8 +264,9 @@ void ToastContentsView::OnWorkAreaChanged() {
   if (!native_view || !collection_.get())
     return;
 
-  collection_->OnDisplayBoundsChanged(gfx::Screen::GetScreenFor(
-      native_view)->GetDisplayNearestWindow(native_view));
+  collection_->OnDisplayMetricsChanged(
+      Screen::GetScreenFor(native_view)->GetDisplayNearestWindow(native_view),
+      gfx::DisplayObserver::DISPLAY_METRIC_WORK_AREA);
 }
 
 // views::View