Add Settings::deviceScaleAdjustment.

Source/core/rendering/TextAutosizer.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 190 matching lines @@
 
 float TextAutosizer::clusterMultiplier(WritingMode writingMode, const TextAutosizingWindowInfo& windowInfo, float textWidth) const
 {
     int logicalWindowWidth = isHorizontalWritingMode(writingMode) ? windowInfo.windowSize.width() : windowInfo.windowSize.height();
     int logicalLayoutWidth = isHorizontalWritingMode(writingMode) ? windowInfo.minLayoutSize.width() : windowInfo.minLayoutSize.height();
     // Ignore box width in excess of the layout width, to avoid extreme multipliers.
     float logicalClusterWidth = std::min<float>(textWidth, logicalLayoutWidth);
 
     float multiplier = logicalClusterWidth / logicalWindowWidth;
     multiplier *= m_document->settings()->textAutosizingFontScaleFactor();
+
+    const ViewportDescription& viewportDescription = m_document->page()->mainFrame()->document()->viewportDescription();
+    if (viewportDescription.type == ViewportDescription::UserAgentStyleSheet) {

[pdr., 2013/10/29 02:04:44]

Can you add this as a helper on ViewportDescription or maybe reuse
ViewportStyleResolver's m_hasAuthorStyle?

[skobes, 2013/10/29 17:43:32]

Done.

+        multiplier *= m_document->settings()->deviceScaleAdjustment();
+    }
     return std::max(1.0f, multiplier);
 }
 
 void TextAutosizer::processClusterInternal(TextAutosizingClusterInfo& clusterInfo, RenderBlock* container, RenderObject* subtreeRoot, const TextAutosizingWindowInfo& windowInfo, float multiplier)
 {
     processContainer(multiplier, container, clusterInfo, subtreeRoot, windowInfo);
 
     Vector<Vector<TextAutosizingClusterInfo> > narrowDescendantsGroups;
     getNarrowDescendantsGroupedByWidth(clusterInfo, narrowDescendantsGroups);
     for (size_t i = 0; i < narrowDescendantsGroups.size(); ++i)
@@ skipping 503 matching lines @@
         if (i + 1 < clusterInfos.size()) {
             float currentWidth = clusterInfos[i].root->contentLogicalWidth();
             float nextWidth = clusterInfos[i + 1].root->contentLogicalWidth();
             if (currentWidth - nextWidth > maxWidthDifferenceWithinGroup)
                 groups.grow(groups.size() + 1);
         }
     }
 }
 
 } // namespace WebCore