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

media/capture/video/shared_memory_buffer_tracker.cc

Index: media/capture/video/shared_memory_buffer_tracker.cc
diff --git a/media/capture/video/shared_memory_buffer_tracker.cc b/media/capture/video/shared_memory_buffer_tracker.cc
index c64ed3849884016ab1c99ef9e4b0123991715e59..dfdae676d226080d37ff528c4b299e3f1791a82a 100644
--- a/media/capture/video/shared_memory_buffer_tracker.cc
+++ b/media/capture/video/shared_memory_buffer_tracker.cc
@@ -5,7 +5,6 @@
 #include "media/capture/video/shared_memory_buffer_tracker.h"
 
 #include "base/memory/ptr_util.h"
-#include "media/capture/video/shared_memory_buffer_handle.h"
 #include "mojo/public/cpp/system/platform_handle.h"
 
 namespace media {
@@ -32,8 +31,7 @@
 
 std::unique_ptr<VideoCaptureBufferHandle>
 SharedMemoryBufferTracker::GetMemoryMappedAccess() {
-  return base::MakeUnique<SharedMemoryBufferHandle>(&shared_memory_,
-                                                    mapped_size_);
+  return base::MakeUnique<SharedMemoryBufferHandle>(this);
 }
 
 mojo::ScopedSharedBufferHandle
@@ -48,4 +46,22 @@
   return shared_memory_.handle();
 }
 
+SharedMemoryBufferHandle::SharedMemoryBufferHandle(
+    SharedMemoryBufferTracker* tracker)
+    : tracker_(tracker) {}
+
+SharedMemoryBufferHandle::~SharedMemoryBufferHandle() = default;
+
+size_t SharedMemoryBufferHandle::mapped_size() const {
+  return tracker_->mapped_size_;
+}
+
+uint8_t* SharedMemoryBufferHandle::data() {
+  return static_cast<uint8_t*>(tracker_->shared_memory_.memory());
+}
+
+const uint8_t* SharedMemoryBufferHandle::data() const {
+  return static_cast<const uint8_t*>(tracker_->shared_memory_.memory());
+}
+
 }  // namespace media