Add OnDisplayMetricsChanged in DisplayObserver.

chrome/browser/extensions/api/system_info/system_info_api.cc

Index: chrome/browser/extensions/api/system_info/system_info_api.cc
diff --git a/chrome/browser/extensions/api/system_info/system_info_api.cc b/chrome/browser/extensions/api/system_info/system_info_api.cc
index 7c76083d5d157e224aed088b78e39ca736cf6c98..99f49f5217ac4f191e716c974cd4e98dbce37c24 100644
--- a/chrome/browser/extensions/api/system_info/system_info_api.cc
+++ b/chrome/browser/extensions/api/system_info/system_info_api.cc
@@ -66,9 +66,10 @@ class SystemInfoEventRouter : public gfx::DisplayObserver,
 
  private:
   // gfx::DisplayObserver:
-  virtual void OnDisplayBoundsChanged(const gfx::Display& display) OVERRIDE;
   virtual void OnDisplayAdded(const gfx::Display& new_display) OVERRIDE;
   virtual void OnDisplayRemoved(const gfx::Display& old_display) OVERRIDE;
+  virtual void OnDisplayMetricsChanged(const gfx::Display& display,
+                                       uint32_t metrics) OVERRIDE;
 
   // RemovableStorageObserver implementation.
   virtual void OnRemovableStorageAttached(
@@ -182,16 +183,16 @@ void SystemInfoEventRouter::OnRemovableStorageDetached(
   DispatchEvent(system_storage::OnDetached::kEventName, args.Pass());
 }
 
-void SystemInfoEventRouter::OnDisplayBoundsChanged(
-    const gfx::Display& display) {
+void SystemInfoEventRouter::OnDisplayAdded(const gfx::Display& new_display) {
   OnDisplayChanged();
 }
 
-void SystemInfoEventRouter::OnDisplayAdded(const gfx::Display& new_display) {
+void SystemInfoEventRouter::OnDisplayRemoved(const gfx::Display& old_display) {
   OnDisplayChanged();
 }
 
-void SystemInfoEventRouter::OnDisplayRemoved(const gfx::Display& old_display) {
+void SystemInfoEventRouter::OnDisplayMetricsChanged(const gfx::Display& display,
+                                                    uint32_t metrics) {
   OnDisplayChanged();
 }