exo: Recreate Surface resources on context lost.

ui/compositor/compositor.cc

 // Copyright (c) 2012 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 "ui/compositor/compositor.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <deque>
@@ skipping 36 matching lines @@
 
 bool IsRunningInMojoShell(base::CommandLine* command_line) {
   const char kMojoShellFlag[] = "mojo-platform-channel-handle";
   return command_line->HasSwitch(kMojoShellFlag);
 }
 
 }  // namespace
 
 namespace ui {
 
+ContextFactory::~ContextFactory() {}
+
+void ContextFactory::AddObserver(ContextFactoryObserver* observer) {
+  observer_list_.AddObserver(observer);
+}
+
+void ContextFactory::RemoveObserver(ContextFactoryObserver* observer) {
+  observer_list_.RemoveObserver(observer);
+}
+
+ContextFactory::ContextFactory() {}
+
 CompositorLock::CompositorLock(Compositor* compositor)
     : compositor_(compositor) {
   if (compositor_->locks_will_time_out_) {
     compositor_->task_runner_->PostDelayedTask(
         FROM_HERE,
         base::Bind(&CompositorLock::CancelLock, AsWeakPtr()),
         base::TimeDelta::FromMilliseconds(kCompositorLockTimeoutMs));
   }
 }
 
@@ skipping 431 matching lines @@
                     observer_list_,
                     OnCompositingLockStateChanged(this));
 }
 
 void Compositor::CancelCompositorLock() {
   if (compositor_lock_)
     compositor_lock_->CancelLock();
 }
 
 }  // namespace ui