[Element / Autofill] Add boundsInViewportFloat() to fix <input> popup misalignment.

third_party/WebKit/public/web/WebElement.h

Index: third_party/WebKit/public/web/WebElement.h
diff --git a/third_party/WebKit/public/web/WebElement.h b/third_party/WebKit/public/web/WebElement.h
index 7ea6bdc5e855ffbca582bcc59afea064f4b3bca4..3f9e9a355bf46df808a98db5e6d27fc2b1281e37 100644
--- a/third_party/WebKit/public/web/WebElement.h
+++ b/third_party/WebKit/public/web/WebElement.h
@@ -38,6 +38,7 @@ namespace blink {
 
 class Element;
 struct WebRect;
+struct WebFloatRect;
 
 // Provides access to some properties of a DOM element node.
 class WebElement : public WebNode {
@@ -74,6 +75,7 @@ public:
     // have been adjusted to include any transformations, including page scale.
     // This function will update the layout if required.
     BLINK_EXPORT WebRect boundsInViewport();
+    BLINK_EXPORT WebFloatRect boundsInViewportFloat();
 
     // Returns the image contents of this element or a null WebImage
     // if there isn't any.