Make the LayoutRect->FloatRect constructor explicit.

Source/core/paint/DeprecatedPaintLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 1551 matching lines @@
 {
     RefPtr<HitTestingTransformState> transformState;
     LayoutPoint offset;
     if (containerTransformState) {
         // If we're already computing transform state, then it's relative to the container (which we know is non-null).
         transformState = HitTestingTransformState::create(*containerTransformState);
         convertToLayerCoords(containerLayer, offset);
     } else {
         // If this is the first time we need to make transform state, then base it off of hitTestLocation,
         // which is relative to rootLayer.
-        transformState = HitTestingTransformState::create(hitTestLocation.transformedPoint(), hitTestLocation.transformedRect(), FloatQuad(hitTestRect));
+        transformState = HitTestingTransformState::create(hitTestLocation.transformedPoint(), hitTestLocation.transformedRect(), FloatQuad(FloatRect(hitTestRect)));
         convertToLayerCoords(rootLayer, offset);
     }
     offset.moveBy(translationOffset);
 
     LayoutObject* containerLayoutObject = containerLayer ? containerLayer->layoutObject() : 0;
     if (layoutObject()->shouldUseTransformFromContainer(containerLayoutObject)) {
         TransformationMatrix containerTransform;
         layoutObject()->getTransformFromContainer(containerLayoutObject, toLayoutSize(offset), containerTransform);
         transformState->applyTransform(containerTransform, HitTestingTransformState::AccumulateTransform);
     } else {
@@ skipping 586 matching lines @@
     if (isRootLayer())
         return LayoutRect(m_layoutObject->view()->unscaledDocumentRect());
 
     // The layer created for the LayoutFlowThread is just a helper for painting and hit-testing,
     // and should not contribute to the bounding box. The LayoutMultiColumnSets will contribute
     // the correct size for the layout content of the multicol container.
     if (layoutObject()->isLayoutFlowThread())
         return LayoutRect();
 
     LayoutRect result = clipper().localClipRect();
-    if (result == LayoutRect::infiniteIntRect()) {
+    // TODO(chrishtr): avoid converting to IntRect and back.
+    if (result == LayoutRect(LayoutRect::infiniteIntRect())) {
         LayoutPoint origin;
         result = physicalBoundingBox(ancestorLayer, &origin);
 
         const_cast<DeprecatedPaintLayer*>(this)->stackingNode()->updateLayerListsIfNeeded();
 
         // Reflections are implemented with Layers that hang off of the reflected layer. However,
         // the reflection layer subtree does not include the subtree of the parent Layer, so
         // a recursive computation of stacking children yields no results. This breaks cases when there are stacking
         // children of the parent, that need to be included in reflected composited bounds.
         // Fix this by including composited bounds of stacking children of the reflected Layer.
@@ skipping 492 matching lines @@
 
 void showLayerTree(const blink::LayoutObject* layoutObject)
 {
     if (!layoutObject) {
         fprintf(stderr, "Cannot showLayerTree. Root is (nil)\n");
         return;
     }
     showLayerTree(layoutObject->enclosingLayer());
 }
 #endif