Begin adding support for tab mirroring via the MediaStream audio/video capturing

content/browser/renderer_host/media/media_stream_dispatcher_host_unittest.cc

Index: content/browser/renderer_host/media/media_stream_dispatcher_host_unittest.cc
diff --git a/content/browser/renderer_host/media/media_stream_dispatcher_host_unittest.cc b/content/browser/renderer_host/media/media_stream_dispatcher_host_unittest.cc
index eb56bd9802f317e91d37b0df0fc657be1bdae144..42f3df1d46f777cce89043b8d99e859b8ba1f0c9 100644
--- a/content/browser/renderer_host/media/media_stream_dispatcher_host_unittest.cc
+++ b/content/browser/renderer_host/media/media_stream_dispatcher_host_unittest.cc
@@ -7,7 +7,6 @@
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "content/browser/browser_thread_impl.h"
-#include "content/browser/renderer_host/media/audio_input_device_manager.h"
 #include "content/browser/renderer_host/media/media_stream_dispatcher_host.h"
 #include "content/browser/renderer_host/media/media_stream_manager.h"
 #include "content/browser/renderer_host/media/mock_media_observer.h"
@@ -62,6 +61,15 @@ class MockMediaStreamDispatcherHost : public MediaStreamDispatcherHost,
                                                 components,
                                                 GURL());
   }
+  void OnGenerateStreamForDevice(int page_request_id,
+                                 const StreamOptions& components,
+                                 const std::string& device_id) {
+    MediaStreamDispatcherHost::OnGenerateStreamForDevice(kRenderId,
+                                                         page_request_id,
+                                                         components,
+                                                         device_id,
+                                                         GURL());
+  }
   void OnStopGeneratedStream(const std::string& label) {
     MediaStreamDispatcherHost::OnStopGeneratedStream(kRenderId, label);
   }
@@ -172,13 +180,8 @@ class MediaStreamDispatcherHostTest : public testing::Test {
 
     // Create our own MediaStreamManager.
     audio_manager_.reset(media::AudioManager::Create());
-    scoped_refptr<media_stream::AudioInputDeviceManager>
-        audio_input_device_manager(
-            new media_stream::AudioInputDeviceManager(audio_manager_.get()));
-    scoped_refptr<media_stream::VideoCaptureManager> video_capture_manager(
-        new media_stream::VideoCaptureManager());
-    media_stream_manager_.reset(new media_stream::MediaStreamManager(
-        audio_input_device_manager, video_capture_manager));
+    media_stream_manager_.reset(
+        new media_stream::MediaStreamManager(audio_manager_.get()));
     // Make sure we use fake devices to avoid long delays.
     media_stream_manager_->UseFakeDevice();
 
@@ -240,6 +243,32 @@ TEST_F(MediaStreamDispatcherHostTest, GenerateStream) {
   EXPECT_EQ(host_->NumberOfStreams(), 0u);
 }
 
+TEST_F(MediaStreamDispatcherHostTest, GenerateStreamForDevice) {
+  static const char kDeviceId[] = "/dev/video0";
+
+  StreamOptions options(content::MEDIA_NO_SERVICE,
+                        content::MEDIA_DEVICE_VIDEO_CAPTURE);
+
+  EXPECT_CALL(*host_, GetMediaObserver())
+      .WillRepeatedly(Return(media_observer_.get()));
+  EXPECT_CALL(*host_, OnStreamGenerated(kRenderId, kPageRequestId, 0, 1));
+  host_->OnGenerateStreamForDevice(kPageRequestId, options, kDeviceId);
+
+  EXPECT_CALL(*media_observer_.get(), OnCaptureDevicesOpened(_, _, _));
+  EXPECT_CALL(*media_observer_.get(), OnCaptureDevicesClosed(_, _, _));
+
+  WaitForResult();
+
+  std::string label = host_->label_;
+
+  EXPECT_EQ(0u, host_->audio_devices_.size());
+  EXPECT_EQ(1u, host_->video_devices_.size());
+  EXPECT_EQ(1u, host_->NumberOfStreams());
+
+  host_->OnStopGeneratedStream(label);
+  EXPECT_EQ(0u, host_->NumberOfStreams());
+}
+
 TEST_F(MediaStreamDispatcherHostTest, GenerateThreeStreams) {
   // This test opens three video capture devices. Two fake devices exists and it
   // is expected the last call to |Open()| will open the first device again, but