Updates volume to change by .05 increments.

third_party/WebKit/Source/modules/media_controls/MediaControlsImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 852 matching lines @@
     if (key == "Enter" || ToKeyboardEvent(event)->keyCode() == ' ') {
       play_button_->OnMediaKeyboardEvent(event);
       return;
     }
     if (key == "ArrowLeft" || key == "ArrowRight" || key == "Home" ||
         key == "End") {
       timeline_->OnMediaKeyboardEvent(event);
       return;
     }
     if (key == "ArrowDown" || key == "ArrowUp") {
-      volume_slider_->OnMediaKeyboardEvent(event);
+      for (int i = 0; i < 5; i++)
+        volume_slider_->OnMediaKeyboardEvent(event);
       return;
     }
   }
 }
 
 void MediaControlsImpl::HideMediaControlsTimerFired(TimerBase*) {
   unsigned behavior_flags =
       hide_timer_behavior_flags_ | kIgnoreFocus | kIgnoreVideoHover;
   hide_timer_behavior_flags_ = kIgnoreNone;
   keep_showing_until_timer_fires_ = false;
@@ skipping 368 matching lines @@
   visitor->Trace(overlay_cast_button_);
   visitor->Trace(media_event_listener_);
   visitor->Trace(window_event_listener_);
   visitor->Trace(orientation_lock_delegate_);
   visitor->Trace(rotate_to_fullscreen_delegate_);
   MediaControls::Trace(visitor);
   HTMLDivElement::Trace(visitor);
 }
 
 }  // namespace blink