chromeos: Stop calling ProfileManager::GetDefaultProfile() from extension event dispatch functions

chrome/browser/extensions/system/system_api.h

Index: chrome/browser/extensions/system/system_api.h
diff --git a/chrome/browser/extensions/system/system_api.h b/chrome/browser/extensions/system/system_api.h
index 5e26978d8aa8107d4d47752836e0c5b29a1b0560..1eb2de4a342d9b2aae7191dec1804b9e47dc8d79 100644
--- a/chrome/browser/extensions/system/system_api.h
+++ b/chrome/browser/extensions/system/system_api.h
@@ -35,10 +35,25 @@ class GetUpdateStatusFunction : public SyncExtensionFunction {
   virtual bool RunImpl() OVERRIDE;
 };
 
-void DispatchBrightnessChangedEvent(int brightness, bool user_initiated);
-void DispatchVolumeChangedEvent(double volume, bool is_volume_muted);
-void DispatchScreenUnlockedEvent();
-void DispatchWokeUpEvent();
+// Dispatches systemPrivate.onBrightnessChanged event for extensions.
+// |profile| is used to get extensions::EventRouter.
+void DispatchBrightnessChangedEvent(Profile* profile,
+                                    int brightness,
+                                    bool user_initiated);
+
+// Dispatches systemPrivate.onVolumeChanged event for extensions.
+// |profile| is used to get extensions::EventRouter.
+void DispatchVolumeChangedEvent(Profile* profile,
+                                double volume,
+                                bool is_volume_muted);
+
+// Dispatches systemPrivate.onScreenChanged event for extensions.
+// |profile| is used to get extensions::EventRouter.
+void DispatchScreenUnlockedEvent(Profile* profile);
+
+// Dispatches systemPrivate.onWokeUp event for extensions.
+// |profile| is used to get extensions::EventRouter.
+void DispatchWokeUpEvent(Profile* profile);
 
 }  // namespace extensions