Adding four bezel gestures

chrome/browser/ui/views/ash/volume_controller_chromeos.cc

Index: chrome/browser/ui/views/ash/volume_controller_chromeos.cc
diff --git a/chrome/browser/ui/views/ash/volume_controller_chromeos.cc b/chrome/browser/ui/views/ash/volume_controller_chromeos.cc
index 1db47d8ca262c64319db171515b8a1a0d6e7b241..d789dd07ec20407c6fd73b3417e36022698bc65b 100644
--- a/chrome/browser/ui/views/ash/volume_controller_chromeos.cc
+++ b/chrome/browser/ui/views/ash/volume_controller_chromeos.cc
@@ -68,3 +68,13 @@ bool VolumeController::HandleVolumeUp(const ui::Accelerator& accelerator) {
                                          audio_handler->IsMuted());
   return true;
 }
+
+void VolumeController::SetVolumePercent(double percent) {
+  chromeos::AudioHandler* audio_handler = chromeos::AudioHandler::GetInstance();
+  if (audio_handler->IsMuted()) {
+    audio_handler->SetMuted(false);
+  }
+  audio_handler->SetVolumePercent(percent);
+  extensions::DispatchVolumeChangedEvent(audio_handler->GetVolumePercent(),
+                                         audio_handler->IsMuted());
+}