[Mojo Video Capture] Adapt video_capture service to refactored video capture stack

media/capture/video/shared_memory_buffer_tracker.h

Index: media/capture/video/shared_memory_buffer_tracker.h
diff --git a/media/capture/video/shared_memory_buffer_tracker.h b/media/capture/video/shared_memory_buffer_tracker.h
index bbca851336d9f9240e1ea993825852aefe8bc4fe..1d10727262c689e3cfd85075b7a3f6595624e94b 100644
--- a/media/capture/video/shared_memory_buffer_tracker.h
+++ b/media/capture/video/shared_memory_buffer_tracker.h
@@ -5,12 +5,11 @@
 #ifndef MEDIA_CAPTURE_VIDEO_SHARED_MEMORY_BUFFER_TRACKER_H_
 #define MEDIA_CAPTURE_VIDEO_SHARED_MEMORY_BUFFER_TRACKER_H_
 
+#include "media/capture/video/shared_memory_buffer_handle.h"
 #include "media/capture/video/video_capture_buffer_tracker.h"
 
 namespace media {
 
-class SharedMemoryBufferHandle;
-
 // Tracker specifics for SharedMemory.
 class SharedMemoryBufferTracker final : public VideoCaptureBufferTracker {
  public:
@@ -33,24 +32,6 @@ class SharedMemoryBufferTracker final : public VideoCaptureBufferTracker {
   size_t mapped_size_;
 };
 
-// A simple proxy that implements the BufferHandle interface, providing
-// accessors to SharedMemTracker's memory and properties.
-class SharedMemoryBufferHandle : public VideoCaptureBufferHandle {
- public:
-  // |tracker| must outlive SimpleBufferHandle. This is ensured since a
-  // tracker is pinned until ownership of this SimpleBufferHandle is returned
-  // to VideoCaptureBufferPool.
-  explicit SharedMemoryBufferHandle(SharedMemoryBufferTracker* tracker);
-  ~SharedMemoryBufferHandle() override;
-
-  size_t mapped_size() const override;
-  uint8_t* data() override;
-  const uint8_t* data() const override;
-
- private:
-  SharedMemoryBufferTracker* const tracker_;
-};
-
 }  // namespace media
 
 #endif  // MEDIA_CAPTURE_VIDEO_SHARED_MEMORY_BUFFER_TRACKER_H_