getUserMeida: report device starting states

content/browser/media/capture/desktop_capture_device.cc

 // Copyright (c) 2013 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/media/capture/desktop_capture_device.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
 #include <utility>
@@ skipping 168 matching lines @@
       params.requested_format.frame_size,
       params.resolution_change_policy));
 
   power_save_blocker_.reset(new device::PowerSaveBlocker(
       device::PowerSaveBlocker::kPowerSaveBlockPreventDisplaySleep,
       device::PowerSaveBlocker::kReasonOther, "DesktopCaptureDevice is running",
       BrowserThread::GetTaskRunnerForThread(BrowserThread::UI),
       BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE)));
 
   desktop_capturer_->Start(this);
+  // Assume it will be always started successfully for now.
+  client_->OnStarted();
 
   CaptureFrameAndScheduleNext();
 }
 
 void DesktopCaptureDevice::Core::SetNotificationWindowId(
     gfx::NativeViewId window_id) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK(window_id);
   desktop_capturer_->SetExcludedWindow(window_id);
 }
@@ skipping 261 matching lines @@
 #else
   base::MessageLoop::Type thread_type = base::MessageLoop::TYPE_DEFAULT;
 #endif
 
   thread_.StartWithOptions(base::Thread::Options(thread_type, 0));
 
   core_.reset(new Core(thread_.task_runner(), std::move(capturer), type));
 }
 
 }  // namespace content