Add host-side rate-limiting to desktop resize events.

remoting/host/me2me_desktop_environment.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 "remoting/host/me2me_desktop_environment.h"
 
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
 #include "media/video/capture/screen/screen_capturer.h"
 #include "remoting/host/client_session_control.h"
 #include "remoting/host/curtain_mode.h"
 #include "remoting/host/desktop_resizer.h"
 #include "remoting/host/host_window.h"
 #include "remoting/host/host_window.h"
 #include "remoting/host/host_window_proxy.h"
 #include "remoting/host/local_input_monitor.h"
 #include "remoting/host/resizing_host_observer.h"
 #include "remoting/host/screen_controls.h"
 
 #if defined(OS_POSIX)
 #include <sys/types.h>
 #include <unistd.h>
 #endif  // defined(OS_POSIX)
 
+const char kRateLimitResizeRequests[] = "rateLimitResizeRequests";
+
 namespace remoting {
 
 Me2MeDesktopEnvironment::~Me2MeDesktopEnvironment() {
   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 }
 
 scoped_ptr<ScreenControls> Me2MeDesktopEnvironment::CreateScreenControls() {
   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 
   return scoped_ptr<ScreenControls>(
       new ResizingHostObserver(DesktopResizer::Create()));
 }
 
 scoped_ptr<media::ScreenCapturer>
 Me2MeDesktopEnvironment::CreateVideoCapturer() {
   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 
 #if defined(OS_LINUX)
   return media::ScreenCapturer::CreateWithXDamage(true);
 #else  // !defined(OS_LINUX)
   return media::ScreenCapturer::Create();
 #endif  // !defined(OS_LINUX)
 }
 
+std::string Me2MeDesktopEnvironment::GetCapabilities() const {
+  return kRateLimitResizeRequests;
+}
+
 Me2MeDesktopEnvironment::Me2MeDesktopEnvironment(
     scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
     scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
     scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner)
     : BasicDesktopEnvironment(caller_task_runner,
                               input_task_runner,
                               ui_task_runner) {
   DCHECK(caller_task_runner->BelongsToCurrentThread());
 }
 
@@ skipping 83 matching lines @@
   return desktop_environment.PassAs<DesktopEnvironment>();
 }
 
 void Me2MeDesktopEnvironmentFactory::SetEnableCurtaining(bool enable) {
   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 
   curtain_enabled_ = enable;
 }
 
 }  // namespace remoting