Presentation API: reject screen availability observing on Android low ram devices.

content/browser/presentation/presentation_service_impl.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/presentation/presentation_service_impl.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 555 matching lines @@
 std::string PresentationServiceImpl::ScreenAvailabilityListenerImpl
     ::GetAvailabilityUrl() const {
   return availability_url_;
 }
 
 void PresentationServiceImpl::ScreenAvailabilityListenerImpl
 ::OnScreenAvailabilityChanged(bool available) {
   service_->client_->OnScreenAvailabilityUpdated(availability_url_, available);
 }
 
+void PresentationServiceImpl::ScreenAvailabilityListenerImpl
+::OnScreenAvailabilityNotSupported() {
+  service_->client_->OnScreenAvailabilityNotSupported(availability_url_);
+}
+
 PresentationServiceImpl::NewSessionMojoCallbackWrapper
 ::NewSessionMojoCallbackWrapper(const NewSessionMojoCallback& callback)
     : callback_(callback) {
 }
 
 PresentationServiceImpl::NewSessionMojoCallbackWrapper
 ::~NewSessionMojoCallbackWrapper() {
   if (!callback_.is_null())
     InvokeNewSessionMojoCallbackWithError(callback_);
 }
@@ skipping 41 matching lines @@
 
 void PresentationServiceImpl::DefaultSessionStartContext::Reset() {
   ScopedVector<DefaultSessionMojoCallback> callbacks;
   callbacks.swap(callbacks_);
   for (const auto& callback : callbacks)
     callback->Run(presentation::PresentationSessionInfoPtr());
   session_.reset();
 }
 
 }  // namespace content