Stretching NativeViewHost, and misc tab capture fixes.

ui/views/controls/native/native_view_host.h

Index: ui/views/controls/native/native_view_host.h
diff --git a/ui/views/controls/native/native_view_host.h b/ui/views/controls/native/native_view_host.h
index 6b9aa0ea4ac56f99c96cd1880135240ca2802a19..9e3f730d7dedc710e7bd77b0d0f2fcbc5a507a3e 100644
--- a/ui/views/controls/native/native_view_host.h
+++ b/ui/views/controls/native/native_view_host.h
@@ -50,6 +50,12 @@ class VIEWS_EXPORT NativeViewHost : public View {
   // Sets a preferred size for the native view attached to this View.
   void SetPreferredSize(const gfx::Size& size);
 
+  // Sets a rendering size for the NativeView that may or may not match the size
+  // of this View. If the size does not match, scaling will occur. Pass an empty
+  // size to revert to the default behavior, where the NatieView's rendering
+  // size equals this View's size.
+  void SetRenderingSize(const gfx::Size& size);
+
   // Fast resizing will move the native view and clip its visible region, this
   // will result in white areas and will not resize the content (so scrollbars
   // will be all wrong and content will flow offscreen). Only use this
@@ -113,6 +119,10 @@ class VIEWS_EXPORT NativeViewHost : public View {
   // The preferred size of this View
   gfx::Size preferred_size_;
 
+  // The rendering size of the NativeView, or an empty size if no scaling of the
+  // NativeView should occur.
+  gfx::Size rendering_size_;
+
   // True if the native view is being resized using the fast method described
   // in the setter/accessor above.
   bool fast_resize_;