Add padding values to View.idl

sky/shell/ios/sky_surface.mm

 // Copyright 2015 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.
 
 #import "sky_surface.h"
 
 #import <QuartzCore/QuartzCore.h>
 #import <OpenGLES/EAGL.h>
 #import <OpenGLES/EAGLDrawable.h>
 
@@ skipping 68 matching lines @@
 - (void)layoutSubviews {
   [super layoutSubviews];
 
   [self configureLayerDefaults];
 
   [self setupPlatformViewIfNecessary];
 
   CGSize size = self.bounds.size;
   CGFloat scale = [UIScreen mainScreen].scale;
 
-  _sky_engine->OnViewportMetricsChanged(size.width * scale,
-                                        size.height * scale, scale);
+  ViewportMetricsPtr metrics = ViewportMetrics::New();
+  metrics->physical_width = size.width * scale;
+  metrics->physical_height = size.height * scale;
+  metrics->device_pixel_ratio = scale;
+  _sky_engine->OnViewportMetricsChanged(metrics.Pass());
 }
 
 - (void)configureLayerDefaults {
   CAEAGLLayer* layer = reinterpret_cast<CAEAGLLayer*>(self.layer);
   layer.allowsGroupOpacity = YES;
   layer.opaque = YES;
   CGFloat screenScale = [UIScreen mainScreen].scale;
   layer.contentsScale = screenScale;
   // Note: shouldRasterize is still NO. This is just a defensive measure
   layer.rasterizationScale = screenScale;
@@ skipping 185 matching lines @@
 + (Class)layerClass {
   return [CAEAGLLayer class];
 }
 
 - (void)dealloc {
   [self notifySurfaceDestruction];
   [super dealloc];
 }
 
 @end