Obj-C SDK Cleanup

This CL separates the files under sdk/objc into logical directories, replacing
the previous file layout under Framework/.

A long term goal is to have some system set up to generate the files under
sdk/objc/api (the PeerConnection API wrappers) from the C++ code. In the shorter
term the goal is to abstract out shared concepts from these classes in order to
make them as uniform as possible.

The separation into base/, components/, and helpers/ are to differentiate between
the base layer's common protocols, various utilities and the actual platform
specific components.

The old directory layout that resembled a framework's internal layout is not
necessary, since it is generated by the framework target when building it.

Bug: webrtc:9627
Change-Id: Ib084fd83f050ae980649ca99e841f4fb0580bd8f
Reviewed-on: https://webrtc-review.googlesource.com/94142
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
Commit-Queue: Anders Carlsson <andersc@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24493}
diff --git a/sdk/objc/components/renderer/opengl/RTCEAGLVideoView.h b/sdk/objc/components/renderer/opengl/RTCEAGLVideoView.h
new file mode 100644
index 0000000..50bbf2e
--- /dev/null
+++ b/sdk/objc/components/renderer/opengl/RTCEAGLVideoView.h
@@ -0,0 +1,44 @@
+/*
+ *  Copyright 2015 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 <UIKit/UIKit.h>
+
+#import "RTCMacros.h"
+#import "RTCVideoRenderer.h"
+#import "RTCVideoViewShading.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class RTCEAGLVideoView;
+
+RTC_EXPORT
+@protocol RTCEAGLVideoViewDelegate <RTCVideoViewDelegate>
+@end
+
+/**
+ * RTCEAGLVideoView is an RTCVideoRenderer which renders video frames in its
+ * bounds using OpenGLES 2.0 or OpenGLES 3.0.
+ */
+RTC_EXPORT
+NS_EXTENSION_UNAVAILABLE_IOS("Rendering not available in app extensions.")
+@interface RTCEAGLVideoView : UIView <RTCVideoRenderer>
+
+@property(nonatomic, weak) id<RTCVideoViewDelegate> delegate;
+
+- (instancetype)initWithFrame:(CGRect)frame
+                       shader:(id<RTCVideoViewShading>)shader NS_DESIGNATED_INITIALIZER;
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder
+                       shader:(id<RTCVideoViewShading>)shader NS_DESIGNATED_INITIALIZER;
+
+@end
+
+NS_ASSUME_NONNULL_END