Revert of Add metal view, shaders and renderer.

webrtc/sdk/objc/Framework/Classes/Metal/RTCMTLVideoView.m

Index: webrtc/sdk/objc/Framework/Classes/Metal/RTCMTLVideoView.m
diff --git a/webrtc/sdk/objc/Framework/Classes/Metal/RTCMTLVideoView.m b/webrtc/sdk/objc/Framework/Classes/Metal/RTCMTLVideoView.m
deleted file mode 100644
index 2a18736b25071bba0b2636b9b2bc975295e47dc3..0000000000000000000000000000000000000000
--- a/webrtc/sdk/objc/Framework/Classes/Metal/RTCMTLVideoView.m
+++ /dev/null
@@ -1,107 +0,0 @@
-/*
- *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#import "WebRTC/RTCMTLVideoView.h"
-
-#import <Metal/Metal.h>
-#import <MetalKit/MetalKit.h>
-
-#import "WebRTC/RTCLogging.h"
-#import "WebRTC/RTCVideoFrame.h"
-
-#import "RTCMTLNV12Renderer.h"
-
-@interface RTCMTLVideoView () <MTKViewDelegate>
-@property(nonatomic, strong) id<RTCMTLRenderer> renderer;
-@property(nonatomic, strong) MTKView *metalView;
-@property(atomic, strong) RTCVideoFrame *videoFrame;
-@end
-
-@implementation RTCMTLVideoView {
-  id<RTCMTLRenderer> _renderer;
-}
-
-@synthesize renderer = _renderer;
-@synthesize metalView = _metalView;
-@synthesize videoFrame = _videoFrame;
-
-- (instancetype)initWithFrame:(CGRect)frameRect {
-  self = [super initWithFrame:frameRect];
-  if (self) {
-    [self configure];
-  }
-  return self;
-}
-
-- (instancetype)initWithCoder:(NSCoder *)aCoder {
-  self = [super initWithCoder:aCoder];
-  if (self) {
-    [self configure];
-  }
-  return self;
-}
-
-#pragma mark - Private
-
-+ (BOOL)isMetalAvailable {
-#if defined(__OBJC__) && COREVIDEO_SUPPORTS_METAL
-  return YES;
-#elif
-  return NO;
-#endif
-}
-
-- (void)configure {
-  if ([RTCMTLVideoView isMetalAvailable]) {
-    _metalView = [[MTKView alloc] initWithFrame:self.bounds];
-    [self addSubview:_metalView];
-    _metalView.delegate = self;
-    _metalView.contentMode = UIViewContentModeScaleAspectFit;
-    _metalView.translatesAutoresizingMaskIntoConstraints = NO;
-    UILayoutGuide *margins = self.layoutMarginsGuide;
-    [_metalView.topAnchor constraintEqualToAnchor:margins.topAnchor].active = YES;
-    [_metalView.bottomAnchor constraintEqualToAnchor:margins.bottomAnchor].active = YES;
-    [_metalView.leftAnchor constraintEqualToAnchor:margins.leftAnchor].active = YES;
-    [_metalView.rightAnchor constraintEqualToAnchor:margins.rightAnchor].active = YES;
-
-    _renderer = [[RTCMTLNV12Renderer alloc] init];
-    if (![(RTCMTLNV12Renderer *)_renderer addRenderingDestination:_metalView]) {
-      _renderer = nil;
-    };
-  } else {
-    RTCLogError("Metal configuration falied.");
-  }
-}
-#pragma mark - MTKViewDelegate methods
-
-- (void)drawInMTKView:(nonnull MTKView *)view {
-  NSAssert(view == self.metalView, @"Receiving draw callbacks from foreign instance.");
-  [_renderer drawFrame:self.videoFrame];
-}
-
-- (void)mtkView:(MTKView *)view drawableSizeWillChange:(CGSize)size {
-}
-
-#pragma mark - RTCVideoRenderer
-
-- (void)setSize:(CGSize)size {
-  _metalView.drawableSize = size;
-  [_metalView draw];
-}
-
-- (void)renderFrame:(nullable RTCVideoFrame *)frame {
-  if (frame == nil) {
-    RTCLogInfo(@"Incoming frame is nil. Exiting render callback.");
-    return;
-  }
-  self.videoFrame = frame;
-}
-
-@end