Use float for scroll offset.

third_party/WebKit/Source/core/frame/DOMVisualViewport.h

Index: third_party/WebKit/Source/core/frame/DOMVisualViewport.h
diff --git a/third_party/WebKit/Source/core/frame/DOMVisualViewport.h b/third_party/WebKit/Source/core/frame/DOMVisualViewport.h
index 6f27bb9fb73f7e0d53b9a18534cf28a17060926c..b1923f867e569e5b14d1c4b3825bedde00fa9046 100644
--- a/third_party/WebKit/Source/core/frame/DOMVisualViewport.h
+++ b/third_party/WebKit/Source/core/frame/DOMVisualViewport.h
@@ -57,10 +57,10 @@ class DOMVisualViewport final : public EventTargetWithInlineData {
   const AtomicString& interfaceName() const override;
   ExecutionContext* getExecutionContext() const override;
 
-  double scrollLeft();
-  double scrollTop();
-  double pageX();
-  double pageY();
+  float scrollLeft();

[bokan, 2016/10/02 19:47:50]

Perhaps we should have a ScrollUnit typedef?

[szager1, 2016/10/05 07:43:36]

I'll add the typedef, but I'm not going to try and replace all floats with
ScrollUnit in this patch.  This patch is big enough already.

+  float scrollTop();
+  float pageX();
+  float pageY();
   double clientWidth();
   double clientHeight();
   double scale();