Revert of 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 99f49f5217ac4f191e716c974cd4e98dbce37c24..7c76083d5d157e224aed088b78e39ca736cf6c98 100644
--- a/chrome/browser/extensions/api/system_info/system_info_api.cc
+++ b/chrome/browser/extensions/api/system_info/system_info_api.cc
@@ -66,10 +66,9 @@
 
  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(
@@ -183,16 +182,16 @@
   DispatchEvent(system_storage::OnDetached::kEventName, args.Pass());
 }
 
+void SystemInfoEventRouter::OnDisplayBoundsChanged(
+    const gfx::Display& display) {
+  OnDisplayChanged();
+}
+
 void SystemInfoEventRouter::OnDisplayAdded(const gfx::Display& new_display) {
   OnDisplayChanged();
 }
 
 void SystemInfoEventRouter::OnDisplayRemoved(const gfx::Display& old_display) {
-  OnDisplayChanged();
-}
-
-void SystemInfoEventRouter::OnDisplayMetricsChanged(const gfx::Display& display,
-                                                    uint32_t metrics) {
   OnDisplayChanged();
 }