Make SharedMemory track the size that was actually mapped

content/browser/renderer_host/media/video_capture_buffer_pool.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/renderer_host/media/video_capture_buffer_pool.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/logging.h"
 #include "media/base/video_util.h"
@@ skipping 47 matching lines @@
     if (!candidate->consumer_hold_count && !candidate->held_by_producer) {
       buffer_id = candidate_id;
       break;
     }
   }
   if (!buffer_id)
     return NULL;
 
   Buffer* buffer = buffers_[buffer_id];
 
-  CHECK_GE(buffer->shared_memory.created_size(), GetMemorySize());
+  CHECK_GE(buffer->shared_memory.requested_size(), GetMemorySize());
 
   // Complete the reservation.
   buffer->held_by_producer = true;
   base::Closure disposal_handler = base::Bind(
       &VideoCaptureBufferPool::OnVideoFrameDestroyed, this, buffer_id);
 
   // Wrap the buffer in a VideoFrame container.
   uint8* base_ptr = static_cast<uint8*>(buffer->shared_memory.memory());
   size_t u_offset = size_.GetArea();
   size_t v_offset = u_offset + u_offset / 4;
@@ skipping 93 matching lines @@
   buffer->held_by_producer = false;
 }
 
 bool VideoCaptureBufferPool::IsAllocated() const {
   lock_.AssertAcquired();
   return !buffers_.empty();
 }
 
 }  // namespace content