Presentation API: remove stall PresentationDispatcher::startSession().

content/renderer/presentation/presentation_dispatcher.cc

Index: content/renderer/presentation/presentation_dispatcher.cc
diff --git a/content/renderer/presentation/presentation_dispatcher.cc b/content/renderer/presentation/presentation_dispatcher.cc
index 4ed789a02e6609672d7414700cc37ec71f045618..8627d4c2cc1941428161f8fe571ffd4b5027e7cb 100644
--- a/content/renderer/presentation/presentation_dispatcher.cc
+++ b/content/renderer/presentation/presentation_dispatcher.cc
@@ -113,13 +113,6 @@ void PresentationDispatcher::updateAvailableChangeWatched(bool watched) {
 
 void PresentationDispatcher::startSession(
     const blink::WebString& presentationUrl,
-    const blink::WebString& presentationId,
-    blink::WebPresentationSessionClientCallbacks* callback) {
-  startSession(presentationUrl, callback);
-}
-
-void PresentationDispatcher::startSession(
-    const blink::WebString& presentationUrl,
     blink::WebPresentationSessionClientCallbacks* callback) {
   DCHECK(callback);
   ConnectToPresentationServiceIfNeeded();
@@ -359,6 +352,9 @@ void PresentationDispatcher::OnScreenAvailabilityUpdated(bool available) {
   for (auto observer : availability_observers_)
     observer->availabilityChanged(available);
 
+  for (auto observer : availability_observers_)
+    observer->availabilityChanged(available);
+
   for (AvailabilityCallbacksMap::iterator iter(&availability_callbacks_);
        !iter.IsAtEnd(); iter.Advance()) {
     iter.GetCurrentValue()->onSuccess(new bool(available));