Moving src/webrtc into src/.

In order to eliminate the WebRTC Subtree mirror in Chromium, 
WebRTC is moving the content of the src/webrtc directory up
to the src/ directory.

NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
TBR=tommi@webrtc.org

Bug: chromium:611808
Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38
Reviewed-on: https://webrtc-review.googlesource.com/1560
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19845}

sdk/objc/Framework/Headers/WebRTC/RTCVideoViewShading.h

@@ -0,0 +1,41 @@
+/*
+ *  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 <Foundation/Foundation.h>
+
+#import <WebRTC/RTCVideoFrame.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * RTCVideoViewShading provides a way for apps to customize the OpenGL(ES) shaders used in
+ * rendering for the RTCEAGLVideoView/RTCNSGLVideoView.
+ */
+RTC_EXPORT
+@protocol RTCVideoViewShading <NSObject>
+
+/** Callback for I420 frames. Each plane is given as a texture. */
+- (void)applyShadingForFrameWithWidth:(int)width
+                               height:(int)height
+                             rotation:(RTCVideoRotation)rotation
+                               yPlane:(GLuint)yPlane
+                               uPlane:(GLuint)uPlane
+                               vPlane:(GLuint)vPlane;
+
+/** Callback for NV12 frames. Each plane is given as a texture. */
+- (void)applyShadingForFrameWithWidth:(int)width
+                               height:(int)height
+                             rotation:(RTCVideoRotation)rotation
+                               yPlane:(GLuint)yPlane
+                              uvPlane:(GLuint)uvPlane;
+
+@end
+
+NS_ASSUME_NONNULL_END