Bug 1373888 - part1 : remove useless function. r=cpearce,smaug

These functions didn't be used by anyone, remove them.

MozReview-Commit-ID: BLj8GsVp1gR

dom/html/HTMLVideoElement.cpp

@@ -47,7 +47,6 @@ NS_IMPL_ELEMENT_CLONE(HTMLVideoElement)
 
 HTMLVideoElement::HTMLVideoElement(already_AddRefed<NodeInfo>& aNodeInfo)
   : HTMLMediaElement(aNodeInfo)
-  , mUseScreenWakeLock(true)
   , mIsOrientationLocked(false)
 {
 }
@@ -230,19 +229,6 @@ bool HTMLVideoElement::MozHasAudio() const
   return HasAudio();
 }
 
-bool HTMLVideoElement::MozUseScreenWakeLock() const
-{
-  MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread.");
-  return mUseScreenWakeLock;
-}
-
-void HTMLVideoElement::SetMozUseScreenWakeLock(bool aValue)
-{
-  MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread.");
-  mUseScreenWakeLock = aValue;
-  UpdateScreenWakeLock();
-}
-
 JSObject*
 HTMLVideoElement::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
 {
@@ -334,7 +320,7 @@ HTMLVideoElement::UpdateScreenWakeLock()
 {
   bool hidden = OwnerDoc()->Hidden();
 
-  if (mScreenWakeLock && (mPaused || hidden || !mUseScreenWakeLock)) {
+  if (mScreenWakeLock && (mPaused || hidden)) {
     ErrorResult rv;
     mScreenWakeLock->Unlock(rv);
     rv.SuppressException();
@@ -342,8 +328,7 @@ HTMLVideoElement::UpdateScreenWakeLock()
     return;
   }
 
-  if (!mScreenWakeLock && !mPaused && !hidden &&
-      mUseScreenWakeLock && HasVideo()) {
+  if (!mScreenWakeLock && !mPaused && !hidden && HasVideo()) {
     RefPtr<power::PowerManagerService> pmService =
       power::PowerManagerService::GetInstance();
     NS_ENSURE_TRUE_VOID(pmService);