Remove redundant stack variables from RenderImage.

Source/core/rendering/RenderImage.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011-2012. All rights reserved.
  *
@@ skipping 261 matching lines @@
         // tell any potential compositing layers
         // that the image is done and they can reference it directly.
         contentChanged(ImageChanged);
     }
 }
 
 void RenderImage::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     LayoutUnit cWidth = contentWidth();
     LayoutUnit cHeight = contentHeight();
-    LayoutUnit leftBorder = borderLeft();
-    LayoutUnit topBorder = borderTop();
-    LayoutUnit leftPad = paddingLeft();
-    LayoutUnit topPad = paddingTop();
 
     GraphicsContext* context = paintInfo.context;
 
     if (!m_imageResource->hasImage() || m_imageResource->errorOccurred()) {
         if (paintInfo.phase == PaintPhaseSelection)
             return;
 
         if (cWidth > 2 && cHeight > 2) {
             const int borderWidth = 1;
 
+            LayoutUnit leftBorder = borderLeft();
+            LayoutUnit topBorder = borderTop();
+            LayoutUnit leftPad = paddingLeft();
+            LayoutUnit topPad = paddingTop();
+
             // Draw an outline rect where the image should be.
             context->setStrokeStyle(SolidStroke);
             context->setStrokeColor(Color::lightGray);
             context->setFillColor(Color::transparent);
             context->drawRect(pixelSnappedIntRect(LayoutRect(paintOffset.x() + leftBorder + leftPad, paintOffset.y() + topBorder + topPad, cWidth, cHeight)));
 
             bool errorPictureDrawn = false;
             LayoutSize imageOffset;
             // When calculating the usable dimensions, exclude the pixels of
             // the ouline rect so the error image/alt text doesn't draw on it.
@@ skipping 42 matching lines @@
                 }
                 if (errorPictureDrawn) {
                     if (usableWidth >= textWidth && fontMetrics.height() <= imageOffset.height())
                         context->drawBidiText(font, textRunPaintInfo, textOrigin);
                 } else if (usableWidth >= textWidth && usableHeight >= fontMetrics.height()) {
                     context->drawBidiText(font, textRunPaintInfo, textOrigin);
                 }
             }
         }
     } else if (m_imageResource->hasImage() && cWidth > 0 && cHeight > 0) {
-        RefPtr<Image> img = m_imageResource->image(cWidth, cHeight);
-        if (!img || img->isNull())
-            return;
-
         LayoutRect contentRect = contentBoxRect();
         contentRect.moveBy(paintOffset);
         LayoutRect paintRect = replacedContentRect();
         paintRect.moveBy(paintOffset);
         bool clip = !contentRect.contains(paintRect);
         if (clip) {
             context->save();
             context->clip(contentRect);
         }
 
@@ skipping 71 matching lines @@
     IntRect alignedRect = pixelSnappedIntRect(rect);
     if (!m_imageResource->hasImage() || m_imageResource->errorOccurred() || alignedRect.width() <= 0 || alignedRect.height() <= 0)
         return;
 
     RefPtr<Image> img = m_imageResource->image(alignedRect.width(), alignedRect.height());
     if (!img || img->isNull())
         return;
 
     HTMLImageElement* imageElt = isHTMLImageElement(node()) ? toHTMLImageElement(node()) : 0;
     CompositeOperator compositeOperator = imageElt ? imageElt->compositeOperator() : CompositeSourceOver;
-    Image* image = m_imageResource->image().get();
+    Image* image = img.get();
     InterpolationQuality interpolationQuality = chooseInterpolationQuality(context, image, image, alignedRect.size());
 
     TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "PaintImage", "data", InspectorPaintImageEvent::data(*this));
     // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
     InspectorInstrumentation::willPaintImage(this);
     InterpolationQuality previousInterpolationQuality = context->imageInterpolationQuality();
     context->setImageInterpolationQuality(interpolationQuality);
-    context->drawImage(m_imageResource->image(alignedRect.width(), alignedRect.height()).get(), alignedRect, compositeOperator, shouldRespectImageOrientation());
+    context->drawImage(image, alignedRect, compositeOperator, shouldRespectImageOrientation());
     context->setImageInterpolationQuality(previousInterpolationQuality);
     InspectorInstrumentation::didPaintImage(this);
 }
 
 bool RenderImage::boxShadowShouldBeAppliedToBackground(BackgroundBleedAvoidance bleedAvoidance, InlineFlowBox*) const
 {
     if (!RenderBoxModelObject::boxShadowShouldBeAppliedToBackground(bleedAvoidance))
         return false;
 
     return !const_cast<RenderImage*>(this)->boxDecorationBackgroundIsKnownToBeObscured();
@@ skipping 156 matching lines @@
         return 0;
 
     ImageResource* cachedImage = m_imageResource->cachedImage();
     if (cachedImage && cachedImage->image() && cachedImage->image()->isSVGImage())
         return toSVGImage(cachedImage->image())->embeddedContentBox();
 
     return 0;
 }
 
 } // namespace blink