Adding a unit test to verify the IPC channel between the network and desktop processes.

media/video/capture/screen/screen_capturer_fake.h

 // 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.
 
 #ifndef MEDIA_VIDEO_CAPTURE_SCREEN_SCREEN_CAPTURER_FAKE_H_
 #define MEDIA_VIDEO_CAPTURE_SCREEN_SCREEN_CAPTURER_FAKE_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "media/base/media_export.h"
 #include "media/video/capture/screen/screen_capturer.h"
@@ skipping 32 matching lines @@
   int bytes_per_row_;
   int box_pos_x_;
   int box_pos_y_;
   int box_speed_x_;
   int box_speed_y_;
 
   ScreenCapturerHelper helper_;
 
   // We have two buffers for the screen images as required by Capturer.
   static const int kNumBuffers = 2;
-  scoped_array<uint8> buffers_[kNumBuffers];
+  uint8* buffers_[kNumBuffers];
 
   // The current buffer with valid data for reading.
   int current_buffer_;
 
+  // Used when |delegate_| implements CreateSharedBuffer().
+  scoped_refptr<SharedBuffer> shared_buffers_[kNumBuffers];
+
+  // Used when |delegate_| does not implement CreateSharedBuffer().
+  scoped_array<uint8> private_buffers_[kNumBuffers];
+
   DISALLOW_COPY_AND_ASSIGN(ScreenCapturerFake);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_SCREEN_SCREEN_CAPTURER_FAKE_H_