Add initWithCoder to RTCEAGLVideoView.

Allows for proper OpenGL initialization if view is created from
storyboard.

BUG=3896
R=jiayl@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/34549004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7970 4adac7df-926f-26a2-2b94-8c16560cd09d

talk/app/webrtc/objc/RTCEAGLVideoView.m

@@ -108,6 +108,19 @@
 
 - (instancetype)initWithFrame:(CGRect)frame {
   if (self = [super initWithFrame:frame]) {
+    [self configure];
+  }
+  return self;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+  if (self = [super initWithCoder:aDecoder]) {
+    [self configure];
+  }
+  return self;
+}
+
+- (void)configure {
   EAGLContext* glContext =
     [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
   _glRenderer = [[RTCOpenGLVideoRenderer alloc] initWithContext:glContext];
@@ -151,8 +164,6 @@
       [strongSelf.glkView setNeedsDisplay];
     }];
   [self setupGL];
-  }
-  return self;
 }
 
 - (void)dealloc {