ios uiwebview width will not expand to full landscape

I have a simple html page with no css formatting being displayed in a uiwebview. My uiwebview in landscape mode is rotated correctly, but the size is limited to what appears to be portrait size. The app uses a landscape mode and is never in portrait mode. The UIWebView code is in a plugin that is running in unity3d. Here is the code.

   UIView *view = UnityGetGLViewController().view;
         webView = [[UIWebView alloc] initWithFrame:view.frame];
         webView.delegate = self;
         webView.opaque = NO;
         webView.backgroundColor = [UIColor clearColor];
         webView.hidden = YES;
         webView.autoresizingMask=(UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth);
         [view addSubview:webView];
         gameObjectName = [[NSString stringWithUTF8String:gameObjectName_] retain];
         webView.autoresizesSubviews = YES;