Low risk nullable => non-nullable change

third_party/WebKit/Source/core/imagebitmap/ImageBitmapOptions.idl

Index: third_party/WebKit/Source/core/imagebitmap/ImageBitmapOptions.idl
diff --git a/third_party/WebKit/Source/core/imagebitmap/ImageBitmapOptions.idl b/third_party/WebKit/Source/core/imagebitmap/ImageBitmapOptions.idl
index d34204e7901272327573c65bad37ca158a540812..4073e6a4305c2fa2f6096ec353216da9efb1dc96 100644
--- a/third_party/WebKit/Source/core/imagebitmap/ImageBitmapOptions.idl
+++ b/third_party/WebKit/Source/core/imagebitmap/ImageBitmapOptions.idl
@@ -12,7 +12,7 @@ dictionary ImageBitmapOptions {
     ImageOrientation imageOrientation = "none";
     PremultiplyAlpha premultiplyAlpha = "default";
     CanvasColorSpace colorSpaceConversion = "default";
-    [RuntimeEnabled=ExperimentalCanvasFeatures, EnforceRange] unsigned long? resizeWidth;
-    [RuntimeEnabled=ExperimentalCanvasFeatures, EnforceRange] unsigned long? resizeHeight;
+    [RuntimeEnabled=ExperimentalCanvasFeatures, EnforceRange] unsigned long resizeWidth;

[foolip, 2016/12/14 16:36:36]

For any drive-by reviewers: a change like this would typically be observable,
because { resizeWidth: null } goes from behaving like {} to { resizeWidth: 0 }.
However, as used in the C++ code, missing is treated as 0, so it's not
observable.

+    [RuntimeEnabled=ExperimentalCanvasFeatures, EnforceRange] unsigned long resizeHeight;
     [RuntimeEnabled=ExperimentalCanvasFeatures] ResizeQuality resizeQuality = "low";
 };