Convert some call sites to use explicit LayoutRect->FloatRect conversion.

Source/core/paint/ImagePainter.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/paint/ImagePainter.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/editing/FrameSelection.h"
@@ skipping 90 matching lines @@
             return;
         LayoutRect contentRect = m_layoutImage.contentBoxRect();
         contentRect.moveBy(paintOffset);
         LayoutRect paintRect = m_layoutImage.replacedContentRect();
         paintRect.moveBy(paintOffset);
 
         LayoutObjectDrawingRecorder drawingRecorder(*context, m_layoutImage, paintInfo.phase, contentRect);
         bool clip = !contentRect.contains(paintRect);
         if (clip) {
             context->save();
-            context->clip(contentRect);
+            // TODO(chrishtr): this should be pixel-snapped.
+            context->clip(FloatRect(contentRect));
         }
 
         paintIntoRect(context, paintRect);
 
         if (clip)
             context->restore();
     }
 }
 
 void ImagePainter::paintIntoRect(GraphicsContext* context, const LayoutRect& rect)
@@ skipping 14 matching lines @@
 
     TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "PaintImage", "data", InspectorPaintImageEvent::data(m_layoutImage));
 
     InterpolationQuality previousInterpolationQuality = context->imageInterpolationQuality();
     context->setImageInterpolationQuality(interpolationQuality);
     context->drawImage(image.get(), alignedRect, SkXfermode::kSrcOver_Mode, m_layoutImage.shouldRespectImageOrientation());
     context->setImageInterpolationQuality(previousInterpolationQuality);
 }
 
 } // namespace blink