Fix distorted image issue when open some images in a new browser window.

Source/core/fetch/ImageResource.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
@@ skipping 223 matching lines @@
 }
 
 bool ImageResource::imageHasRelativeHeight() const
 {
     if (m_image)
         return m_image->hasRelativeHeight();
 
     return false;
 }
 
+void ImageResource::applyMultiplier(LayoutSize& imageSize, float multiplier) const
+{
+    if (multiplier == 1.0f)
+        return;
+
+    // Don't let images that have a width/height >= 1 shrink below 1 when zoomed.
+    float widthScale = m_image->hasRelativeWidth() ? 1.0f : multiplier;
+    float heightScale = m_image->hasRelativeHeight() ? 1.0f : multiplier;
+    LayoutSize minimumSize(imageSize.width() > 0 ? 1 : 0, imageSize.height() > 0 ? 1 : 0);
+    imageSize.scale(widthScale, heightScale);
+    imageSize.clampToMinimumSize(minimumSize);
+    ASSERT(multiplier != 1.0f || (imageSize.width().fraction() == 0.0f && imageSize.height().fraction() == 0.0f));
+}
+
+LayoutSize ImageResource::bitmapImageSizeRespectingOrientation(float multiplier) const
+{
+    ASSERT(!isPurgeable());
+
+    if (!m_image || !m_image->isBitmapImage())
+        return IntSize();

[abarth-chromium, 2014/02/15 18:58:33]

So, this won't work for SVG images?  Should this be an ASSERT so indicate that
it's an error to call this function for non-bitmap images?

+
+    LayoutSize imageSize = toBitmapImage(m_image.get())->sizeRespectingOrientation();
+    applyMultiplier(imageSize, multiplier);
+    return imageSize;
+}
+
 LayoutSize ImageResource::imageSizeForRenderer(const RenderObject* renderer, float multiplier, SizeType sizeType)
 {
     ASSERT(!isPurgeable());
 
     if (!m_image)
         return IntSize();
 
     LayoutSize imageSize;
 
     if (m_image->isBitmapImage() && (renderer && renderer->shouldRespectImageOrientation() == RespectImageOrientation))
         imageSize = toBitmapImage(m_image.get())->sizeRespectingOrientation();
     else if (m_image->isSVGImage() && sizeType == NormalSize)
         imageSize = m_svgImageCache->imageSizeForRenderer(renderer);
     else
         imageSize = m_image->size();
 
-    if (multiplier == 1.0f)
-        return imageSize;
-
-    // Don't let images that have a width/height >= 1 shrink below 1 when zoomed.
-    float widthScale = m_image->hasRelativeWidth() ? 1.0f : multiplier;
-    float heightScale = m_image->hasRelativeHeight() ? 1.0f : multiplier;
-    LayoutSize minimumSize(imageSize.width() > 0 ? 1 : 0, imageSize.height() > 0 ? 1 : 0);
-    imageSize.scale(widthScale, heightScale);
-    imageSize.clampToMinimumSize(minimumSize);
-    ASSERT(multiplier != 1.0f || (imageSize.width().fraction() == 0.0f && imageSize.height().fraction() == 0.0f));
+    applyMultiplier(imageSize, multiplier);
     return imageSize;
 }
 
 void ImageResource::computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio)
 {
     if (m_image)
         m_image->computeIntrinsicDimensions(intrinsicWidth, intrinsicHeight, intrinsicRatio);
 }
 
 void ImageResource::notifyObservers(const IntRect* changeRect)
@@ skipping 182 matching lines @@
 bool ImageResource::isAccessAllowed(SecurityOrigin* securityOrigin)
 {
     if (!image()->currentFrameHasSingleSecurityOrigin())
         return false;
     if (passesAccessControlCheck(securityOrigin))
         return true;
     return !securityOrigin->taintsCanvas(response().url());
 }
 
 } // namespace WebCore