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

third_party/WebKit/Source/core/dom/Element.cpp

Index: third_party/WebKit/Source/core/dom/Element.cpp
diff --git a/third_party/WebKit/Source/core/dom/Element.cpp b/third_party/WebKit/Source/core/dom/Element.cpp
index 61151db94f3a35cfa29ca5a83bcc15397100f908..a15a0015f8be1014e4177743bc800f3a8887ba67 100644
--- a/third_party/WebKit/Source/core/dom/Element.cpp
+++ b/third_party/WebKit/Source/core/dom/Element.cpp
@@ -1013,13 +1013,33 @@ bool Element::hasNonEmptyLayoutSize() const
     return false;
 }
 
-IntRect Element::boundsInViewport()
+bool Element::getBoundingQuads(Vector<FloatQuad>& quads)
+{
+    assert(quads.isEmpty());
+    if (isSVGElement() && layoutObject()) {
+        // Get the bounding rectangle from the SVG model.
+        if (toSVGElement(this)->isSVGGraphicsElement())
+            quads.append(layoutObject()->localToAbsoluteQuad(layoutObject()->objectBoundingBox()));
+    } else {
+        // Get the bounding rectangle from the box model.
+        if (layoutBoxModelObject())
+            layoutBoxModelObject()->absoluteQuads(quads);
+    }
+    return !quads.isEmpty();
+}
+
+IntRect Element::boundsInViewportInt()
+{
+    return enclosingIntRect(boundsInViewportFloat());
+}
+
+FloatRect Element::boundsInViewportFloat()
 {
     document().updateLayoutIgnorePendingStylesheets();
 
     FrameView* view = document().view();
     if (!view)
-        return IntRect();
+        return FloatRect();
 
     Vector<FloatQuad> quads;
     if (isSVGElement() && layoutObject()) {
@@ -1031,13 +1051,12 @@ IntRect Element::boundsInViewport()
         if (layoutBoxModelObject())
             layoutBoxModelObject()->absoluteQuads(quads);
     }
-
     if (quads.isEmpty())
-        return IntRect();
+        return FloatRect();
 
-    IntRect result = quads[0].enclosingBoundingBox();
+    FloatRect result = quads[0].boundingBox();
     for (size_t i = 1; i < quads.size(); ++i)
-        result.unite(quads[i].enclosingBoundingBox());
+        result.unite(quads[i].boundingBox());
 
     return view->contentsToViewport(result);
 }