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

chrome/browser/ui/ash/volume_controller_chromeos.cc

Index: chrome/browser/ui/ash/volume_controller_chromeos.cc
diff --git a/chrome/browser/ui/ash/volume_controller_chromeos.cc b/chrome/browser/ui/ash/volume_controller_chromeos.cc
index 034f0d29e247a7b0c97a2398b5cd4f5af72d8b42..40d9f3cdf98115850d371e4662f70e48302dea79 100644
--- a/chrome/browser/ui/ash/volume_controller_chromeos.cc
+++ b/chrome/browser/ui/ash/volume_controller_chromeos.cc
@@ -7,6 +7,7 @@
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/audio/audio_handler.h"
 #include "chrome/browser/extensions/system/system_api.h"
+#include "chrome/browser/profiles/profile_manager.h"
 #include "content/public/browser/user_metrics.h"
 
 namespace {
@@ -26,8 +27,12 @@ bool VolumeController::HandleVolumeMute(const ui::Accelerator& accelerator) {
   // http://crosbug.com/3751
   audio_handler->SetMuted(true);
 
-  extensions::DispatchVolumeChangedEvent(audio_handler->GetVolumePercent(),
-                                         audio_handler->IsMuted());
+  Profile* profile = ProfileManager::GetDefaultProfile();
+  if (profile) {
+    extensions::DispatchVolumeChangedEvent(profile,
+                                           audio_handler->GetVolumePercent(),
+                                           audio_handler->IsMuted());
+  }
   return true;
 }
 
@@ -41,8 +46,12 @@ bool VolumeController::HandleVolumeDown(const ui::Accelerator& accelerator) {
   else
     audio_handler->AdjustVolumeByPercent(-kStepPercentage);
 
-  extensions::DispatchVolumeChangedEvent(audio_handler->GetVolumePercent(),
-                                         audio_handler->IsMuted());
+  Profile* profile = ProfileManager::GetDefaultProfile();
+  if (profile) {
+    extensions::DispatchVolumeChangedEvent(profile,
+                                           audio_handler->GetVolumePercent(),
+                                           audio_handler->IsMuted());
+  }
   return true;
 }
 
@@ -62,8 +71,12 @@ bool VolumeController::HandleVolumeUp(const ui::Accelerator& accelerator) {
     audio_handler->AdjustVolumeByPercent(kStepPercentage);
   }
 
-  extensions::DispatchVolumeChangedEvent(audio_handler->GetVolumePercent(),
-                                         audio_handler->IsMuted());
+  Profile* profile = ProfileManager::GetDefaultProfile();
+  if (profile) {
+    extensions::DispatchVolumeChangedEvent(profile,
+                                           audio_handler->GetVolumePercent(),
+                                           audio_handler->IsMuted());
+  }
   return true;
 }
 
@@ -88,6 +101,10 @@ void VolumeController::SetVolumeLevel(float level) {
 void VolumeController::SetVolumePercent(double percent) {
   chromeos::AudioHandler* audio_handler = chromeos::AudioHandler::GetInstance();
   audio_handler->SetVolumePercent(percent);
-  extensions::DispatchVolumeChangedEvent(audio_handler->GetVolumePercent(),
-                                         audio_handler->IsMuted());
+  Profile* profile = ProfileManager::GetDefaultProfile();
+  if (profile) {
+    extensions::DispatchVolumeChangedEvent(profile,
+                                           audio_handler->GetVolumePercent(),
+                                           audio_handler->IsMuted());
+  }
 }