Revert of media: add video capture device for ARC++ camera HAL v3

media/capture/video/chromeos/camera_hal_delegate.h

Index: media/capture/video/chromeos/camera_hal_delegate.h
diff --git a/media/capture/video/chromeos/camera_hal_delegate.h b/media/capture/video/chromeos/camera_hal_delegate.h
deleted file mode 100644
index 15637825122b558ecce492b339a194417dac3454..0000000000000000000000000000000000000000
--- a/media/capture/video/chromeos/camera_hal_delegate.h
+++ /dev/null
@@ -1,147 +0,0 @@
-// Copyright 2017 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_CAPTURE_VIDEO_CHROMEOS_CAMERA_HAL_DELEGATE_H_
-#define MEDIA_CAPTURE_VIDEO_CHROMEOS_CAMERA_HAL_DELEGATE_H_
-
-#include <memory>
-#include <string>
-#include <unordered_map>
-
-#include "base/macros.h"
-#include "base/sequence_checker.h"
-#include "base/synchronization/waitable_event.h"
-#include "base/threading/thread.h"
-#include "media/capture/video/chromeos/mojo/arc_camera3.mojom.h"
-#include "media/capture/video/video_capture_device_factory.h"
-#include "media/capture/video_capture_types.h"
-#include "mojo/public/cpp/bindings/binding.h"
-
-namespace media {
-
-// CameraHalDelegate is the component which does Mojo IPCs to the camera HAL
-// process on Chrome OS to access the module-level camera functionalities such
-// as camera device info look-up and opening camera devices.
-//
-// CameraHalDelegate is refcounted because VideoCaptureDeviceFactoryChromeOS and
-// CameraDeviceDelegate both need to reference CameraHalDelegate, and
-// VideoCaptureDeviceFactoryChromeOS may be destroyed while CameraDeviceDelegate
-// is still alive.
-class CAPTURE_EXPORT CameraHalDelegate final
-    : public base::RefCountedThreadSafe<CameraHalDelegate>,
-      public arc::mojom::CameraModuleCallbacks {
- public:
-  // All the Mojo IPC operations happen on |ipc_task_runner|.
-  explicit CameraHalDelegate(
-      scoped_refptr<base::SingleThreadTaskRunner> ipc_task_runner);
-
-  // Establishes the Mojo IPC channel to the camera HAL adapter.  This method
-  // should be called before any other methods of CameraHalDelegate is called.
-  bool StartCameraModuleIpc();
-
-  // Resets |camera_module_| and |camera_module_callbacks_|.
-  void Reset();
-
-  // Delegation methods for the VideoCaptureDeviceFactory interface.  These
-  // methods are called by VideoCaptureDeviceFactoryChromeOS directly.  They
-  // operate on the same thread that the VideoCaptureDeviceFactoryChromeOS runs
-  // on.
-  std::unique_ptr<VideoCaptureDevice> CreateDevice(
-      scoped_refptr<base::SingleThreadTaskRunner>
-          task_runner_for_screen_observer,
-      const VideoCaptureDeviceDescriptor& device_descriptor);
-  void GetSupportedFormats(
-      const VideoCaptureDeviceDescriptor& device_descriptor,
-      VideoCaptureFormats* supported_formats);
-  void GetDeviceDescriptors(VideoCaptureDeviceDescriptors* device_descriptors);
-
-  // Asynchronous method to get the camera info of |camera_id|.  This method may
-  // be called on any thread.
-  using GetCameraInfoCallback =
-      base::Callback<void(int32_t, arc::mojom::CameraInfoPtr)>;
-  void GetCameraInfo(int32_t camera_id, const GetCameraInfoCallback& callback);
-
-  // Asynchronous method to open the camera device designated by |camera_id|.
-  // This method may be called on any thread; |callback| will run on
-  // |ipc_task_runner_|.
-  using OpenDeviceCallback = base::Callback<void(int32_t)>;
-  void OpenDevice(int32_t camera_id,
-                  arc::mojom::Camera3DeviceOpsRequest device_ops_request,
-                  const OpenDeviceCallback& callback);
-
- private:
-  friend class base::RefCountedThreadSafe<CameraHalDelegate>;
-
-  ~CameraHalDelegate() final;
-
-  friend class CameraHalDelegateTest;
-  friend class CameraDeviceDelegateTest;
-  void StartForTesting(arc::mojom::CameraModulePtrInfo info);
-
-  // Resets the Mojo interface and bindings.
-  void ResetMojoInterfaceOnIpcThread();
-
-  // Internal method to update the camera info for all built-in cameras. Runs on
-  // the same thread as CreateDevice, GetSupportedFormats, and
-  // GetDeviceDescriptors.
-  bool UpdateBuiltInCameraInfo();
-  void UpdateBuiltInCameraInfoOnIpcThread();
-  // Callback for GetNumberOfCameras Mojo IPC function.  GetNumberOfCameras
-  // returns the number of built-in cameras on the device.
-  void OnGotNumberOfCamerasOnIpcThread(int32_t num_cameras);
-  // Callback for SetCallbacks Mojo IPC function. SetCallbacks is called after
-  // GetNumberOfCameras is called for the first time, and before any other calls
-  // to |camera_module_|.
-  void OnSetCallbacksOnIpcThread(int32_t result);
-  void GetCameraInfoOnIpcThread(int32_t camera_id,
-                                const GetCameraInfoCallback& callback);
-  void OnGotCameraInfoOnIpcThread(int32_t camera_id,
-                                  int32_t result,
-                                  arc::mojom::CameraInfoPtr camera_info);
-
-  // Called by OpenDevice to actually open the device specified by |camera_id|.
-  // This method runs on |ipc_task_runner_|.
-  void OpenDeviceOnIpcThread(
-      int32_t camera_id,
-      arc::mojom::Camera3DeviceOpsRequest device_ops_request,
-      const OpenDeviceCallback& callback);
-
-  // CameraModuleCallbacks implementation. Operates on |ipc_task_runner_|.
-  void CameraDeviceStatusChange(
-      int32_t camera_id,
-      arc::mojom::CameraDeviceStatus new_status) final;
-
-  // Signaled when |num_builtin_cameras_| and |camera_info_| are updated.
-  // Queried and waited by UpdateBuiltInCameraInfo, signaled by
-  // OnGotCameraInfoOnIpcThread.
-  base::WaitableEvent builtin_camera_info_updated_;
-
-  // |num_builtin_cameras_| stores the number of built-in camera devices
-  // reported by the camera HAL, and |camera_info_| stores the camera info of
-  // each camera device. They are modified only on |ipc_task_runner_|. They
-  // are also read in GetSupportedFormats and GetDeviceDescriptors, in which the
-  // access is sequenced through UpdateBuiltInCameraInfo and
-  // |builtin_camera_info_updated_| to avoid race conditions.
-  size_t num_builtin_cameras_;
-  std::unordered_map<std::string, arc::mojom::CameraInfoPtr> camera_info_;
-
-  SEQUENCE_CHECKER(sequence_checker_);
-
-  // The task runner where all the camera module Mojo communication takes place.
-  const scoped_refptr<base::SingleThreadTaskRunner> ipc_task_runner_;
-
-  // The Mojo proxy to access the camera module at the remote camera HAL.  Bound
-  // to |ipc_task_runner_|.
-  arc::mojom::CameraModulePtr camera_module_;
-
-  // The Mojo binding serving the camera module callbacks.  Bound to
-  // |ipc_task_runner_|.
-  mojo::Binding<arc::mojom::CameraModuleCallbacks> camera_module_callbacks_;
-
-  DISALLOW_COPY_AND_ASSIGN(CameraHalDelegate);
-};
-
-}  // namespace media
-
-#endif  // MEDIA_CAPTURE_VIDEO_CHROMEOS_CAMERA_HAL_DELEGATE_H_