content: Fix lost context handling when using native GpuMemoryBuffers.

content/browser/renderer_host/media/video_capture_buffer_pool_unittest.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.
 
 // Unit test for VideoCaptureBufferPool.
 
 #include "content/browser/renderer_host/media/video_capture_buffer_pool.h"
 
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
@@ skipping 59 matching lines @@
     uint8* const data_;
     bool mapped_;
   };
 
 #if !defined(OS_ANDROID)
   // The next two classes are needed to replicate the GpuMemoryBuffer allocation
   // on Browser side.
   class StubBrowserGpuMemoryBufferManager
       : public BrowserGpuMemoryBufferManager {
    public:
-    StubBrowserGpuMemoryBufferManager()
-        : BrowserGpuMemoryBufferManager(nullptr, 1) {}
+    StubBrowserGpuMemoryBufferManager() : BrowserGpuMemoryBufferManager(1) {}
 
     scoped_ptr<gfx::GpuMemoryBuffer> AllocateGpuMemoryBuffer(
         const gfx::Size& size,
         gfx::GpuMemoryBuffer::Format format,
         gfx::GpuMemoryBuffer::Usage usage) override {
       return make_scoped_ptr(new MockGpuMemoryBuffer(size));
     }
   };
   class MockBufferQueue : public BufferQueue {
    public:
@@ skipping 244 matching lines @@
   if (buffer4->data() != nullptr)
     memset(buffer4->data(), 0x77, buffer4->size());
   buffer4.reset();
 }
 
 INSTANTIATE_TEST_CASE_P(,
                         VideoCaptureBufferPoolTest,
                         testing::ValuesIn(kCaptureFormats));
 
 } // namespace content