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 8bd70c4cf675f61ee62e1bbf453ccf3585087446..3e3d6d70a2fef7b1dc487a09bb98868ead28cec5 100644
--- a/chrome/browser/ui/views/ash/volume_controller_chromeos.cc
+++ b/chrome/browser/ui/views/ash/volume_controller_chromeos.cc
@@ -81,3 +81,14 @@ bool VolumeController::HandleVolumeUp(const ui::Accelerator& accelerator) {
   ShowVolumeBubble();
   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());
+  ShowVolumeBubble();
+}