178291 - using window.fullScreen causes scripts to stop.

r=mstoltz sr=jst

dom/src/base/nsGlobalWindow.cpp

@@ -1893,8 +1893,10 @@ GlobalWindowImpl::GetLength(PRUint32* aLength)
 
 NS_IMETHODIMP GlobalWindowImpl::SetFullScreen(PRBool aFullScreen)
 {
-  if (aFullScreen == mFullScreen)
+  // Only chrome can change our fullScreen mode.
+  if (aFullScreen == mFullScreen || !IsCallerChrome()) {
     return NS_OK;
+  }
 
   // SetFullScreen needs to be called on the root window, so get that
   // via the DocShell tree, and if we are not already the root,

modules/libpref/src/init/all.js

@@ -311,7 +311,6 @@ pref("capability.policy.default.Window.Components", "allAccess");
 pref("capability.policy.default.Window.document", "allAccess");
 pref("capability.policy.default.Window.focus", "allAccess");
 pref("capability.policy.default.Window.frames", "allAccess");
-pref("capability.policy.default.Window.fullScreen", "noAccess");
 pref("capability.policy.default.Window.history", "allAccess");
 pref("capability.policy.default.Window.length", "allAccess");
 pref("capability.policy.default.Window.location", "allAccess");