refactor video capture in browser process to support device sharing across multiple renderer proc...

content/browser/renderer_host/media/video_capture_host_unittest.cc

 // Copyright (c) 2011 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 <map>
 #include <string>
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 255 matching lines @@
     message_loop_->PostTask(
         FROM_HERE,
         base::Bind(&PostQuitOnVideoCaptureManagerThread,
                    message_loop_.get(),
                    content::MockResourceContext::GetInstance()));
     message_loop_->Run();
   }
 
   void StartCapture() {
     InSequence s;
-    // 1. Newly created buffers will arrive.
+    // 1. First - get info about the new resolution
+    EXPECT_CALL(*host_, OnDeviceInfo(kDeviceId));
+
+    // 2. Change state to started
+    EXPECT_CALL(*host_, OnStateChanged(kDeviceId,
+                                       media::VideoCapture::kStarted));
+
+    // 3. Newly created buffers will arrive.
     EXPECT_CALL(*host_, OnNewBufferCreated(kDeviceId, _, _, _))
         .Times(AnyNumber())
         .WillRepeatedly(Return());
 
-    // 2. First - get info about the new resolution
-    EXPECT_CALL(*host_, OnDeviceInfo(kDeviceId));
-
-    // 3. Change state to started
-    EXPECT_CALL(*host_, OnStateChanged(kDeviceId,
-                                       media::VideoCapture::kStarted));
-
     // 4. First filled buffer will arrive.
     EXPECT_CALL(*host_, OnBufferFilled(kDeviceId, _, _))
         .Times(AnyNumber())
         .WillOnce(ExitMessageLoop(message_loop_.get()));
 
     media::VideoCaptureParams params;
     params.width = 352;
     params.height = 288;
     params.frame_per_second = 30;
     params.session_id = kTestFakeDeviceId;
@@ skipping 102 matching lines @@
 }
 
 #ifdef DUMP_VIDEO
 TEST_F(VideoCaptureHostTest, CaptureAndDumpVideoVga) {
   CaptureAndDumpVideo(640, 480, 30);
 }
 TEST_F(VideoCaptureHostTest, CaptureAndDump720P) {
   CaptureAndDumpVideo(1280, 720, 30);
 }
 #endif