Bug 812086 part 1. Add unprefixed version of page visibility API. r=smaug

content/base/src/nsDocument.cpp

@@ -9487,6 +9487,10 @@ nsDocument::UpdateVisibilityState()
   VisibilityState oldState = mVisibilityState;
   mVisibilityState = GetVisibilityState();
   if (oldState != mVisibilityState) {
+    nsContentUtils::DispatchTrustedEvent(this, static_cast<nsIDocument*>(this),
+                                         NS_LITERAL_STRING("visibilitychange"),
+                                         /* bubbles = */ true,
+                                         /* cancelable = */ false);
     nsContentUtils::DispatchTrustedEvent(this, static_cast<nsIDocument*>(this),
                                          NS_LITERAL_STRING("mozvisibilitychange"),
                                          /* bubbles = */ true,
@@ -9522,6 +9526,12 @@ nsDocument::PostVisibilityUpdateEvent()
 
 NS_IMETHODIMP
 nsDocument::GetMozHidden(bool* aHidden)
+{
+  return GetHidden(aHidden);
+}
+
+NS_IMETHODIMP
+nsDocument::GetHidden(bool* aHidden)
 {
   *aHidden = mVisibilityState != eVisible;
   return NS_OK;
@@ -9529,6 +9539,12 @@ nsDocument::GetMozHidden(bool* aHidden)
 
 NS_IMETHODIMP
 nsDocument::GetMozVisibilityState(nsAString& aState)
+{
+  return GetVisibilityState(aState);
+}
+
+NS_IMETHODIMP
+nsDocument::GetVisibilityState(nsAString& aState)
 {
   // This needs to stay in sync with the VisibilityState enum.
   static const char states[][8] = {

content/base/src/nsDocument.h

@@ -1258,7 +1258,7 @@ protected:
   nsRefPtr<nsDOMNavigationTiming> mTiming;
 private:
   friend class nsUnblockOnloadEvent;
-  // This needs to stay in sync with the list in GetMozVisibilityState.
+  // This needs to stay in sync with the list in GetVisibilityState.
   enum VisibilityState {
     eHidden = 0,
     eVisible,

dom/interfaces/core/nsIDOMDocument.idl

@@ -27,7 +27,7 @@ interface nsIDOMLocation;
  * http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html
  */
 
-[scriptable, uuid(22af46a3-64ac-430a-bcc7-d0a9aefe474f)]
+[scriptable, uuid(31ce7ae7-15d5-4fc8-912b-ae0e23e93146)]
 interface nsIDOMDocument : nsIDOMNode
 {
   readonly attribute nsIDOMDocumentType         doctype;
@@ -385,7 +385,9 @@ interface nsIDOMDocument : nsIDOMNode
   /**
    * Visibility API implementation.
    */
+  readonly attribute boolean hidden;
   readonly attribute boolean mozHidden;
+  readonly attribute DOMString visibilityState;
   readonly attribute DOMString mozVisibilityState;
 
   /**