VideoCaptureBufferPool: Refactor to allow support of non-ShMem backed buffers

media/video/capture/fake_video_capture_device_unittest.cc

Index: media/video/capture/fake_video_capture_device_unittest.cc
diff --git a/media/video/capture/fake_video_capture_device_unittest.cc b/media/video/capture/fake_video_capture_device_unittest.cc
index 042fa7c8de9d94033bedba3641562596b9a723a8..e413c5ed4d7062636bac181d4dfa8b5b639ab319 100644
--- a/media/video/capture/fake_video_capture_device_unittest.cc
+++ b/media/video/capture/fake_video_capture_device_unittest.cc
@@ -75,12 +75,11 @@ class MockClient : public VideoCaptureDevice::Client {
   }
 
   // Virtual methods for capturing using Client's Buffers.
-  scoped_refptr<Buffer> ReserveOutputBuffer(VideoFrame::Format format,
+  scoped_refptr<Buffer> ReserveOutputBuffer(media::VideoPixelFormat format,
                                             const gfx::Size& dimensions) {
-    EXPECT_EQ(format, VideoFrame::I420);
+    EXPECT_EQ(format, PIXEL_FORMAT_I420);
     EXPECT_GT(dimensions.GetArea(), 0);
-    return make_scoped_refptr(
-        new MockBuffer(0, VideoFrame::AllocationSize(format, dimensions)));
+    return make_scoped_refptr(new MockBuffer(0, dimensions.GetArea() * 3 / 2));
   }
   void OnIncomingCapturedVideoFrame(
       const scoped_refptr<Buffer>& buffer,