[Remoting iOS] Fix screen tearing and screen dimensions

remoting/client/ios/display/gl_display_handler.h

 // 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 REMOTING_CLIENT_IOS_DISPLAY_GL_DISPLAY_HANDLER_H_
 #define REMOTING_CLIENT_IOS_DISPLAY_GL_DISPLAY_HANDLER_H_
 
 #import <Foundation/Foundation.h>
 #import <GLKit/GLKit.h>
 
@@ skipping 10 matching lines @@
 class VideoRenderer;
 class CursorShapeStub;
 
 }  // namespace protocol
 }  // namespace remoting
 
 @interface GlDisplayHandler : NSObject {
 }
 
 - (void)stop;
-- (void)glkView:(GLKView*)view drawInRect:(CGRect)rect;
+
+// Called once the GLKView created.
+- (void)onSurfaceCreated:(GLKView*)view;
+
+// Called every time the GLKView dimension is initialized or changed.
+- (void)onSurfaceChanged:(const CGRect&)frame;
+
 - (std::unique_ptr<remoting::protocol::VideoRenderer>)CreateVideoRenderer;
 - (std::unique_ptr<remoting::protocol::CursorShapeStub>)CreateCursorShapeStub;
 
 - (EAGLContext*)GetEAGLContext;
 
 @end
 
 #endif  // REMOTING_CLIENT_IOS_DISPLAY_GL_DISPLAY_HANDLER_H_