Zoom instead of autosizing for desktop sites.

Source/web/PageScaleConstraintsSet.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 164 matching lines @@
     }
 
     if (adjustedLayoutSizeWidth != m_pageDefinedConstraints.layoutSize.width()) {
         ASSERT(m_pageDefinedConstraints.layoutSize.width() > 0);
         float adjustedLayoutSizeHeight = (adjustedLayoutSizeWidth * m_pageDefinedConstraints.layoutSize.height()) / m_pageDefinedConstraints.layoutSize.width();
         m_pageDefinedConstraints.layoutSize.setWidth(adjustedLayoutSizeWidth);
         m_pageDefinedConstraints.layoutSize.setHeight(adjustedLayoutSizeHeight);
     }
 }
 
+void PageScaleConstraintsSet::applyDeviceScaleAdjustment(const ViewportDescription& viewportDescription, float deviceScaleAdjustment, float minimumWidth)
+{
+    // If possible, reduce the layout width instead of applying text autosizing.
+    // But don't reduce below the minimum fallback width and don't reduce if explicitly specified by the page author.
+    float width = m_pageDefinedConstraints.layoutSize.width();
+    if (width > minimumWidth && !viewportDescription.isSpecifiedByAuthor() && deviceScaleAdjustment > 1.0f)

[aelias_OOO_until_Jul13, 2013/11/07 02:05:25]

Can we delete the condition "deviceScaleAdjustment > 1.0f"?  If <1 values are
bad then we should avoid producing them in GetDeviceScaleAdjustment() on the
Chromium side in the first place.

[skobes, 2013/11/07 17:55:27]

Done.

+        m_pageDefinedConstraints.layoutSize.setWidth(std::max(minimumWidth, width / deviceScaleAdjustment));
+}
+
 } // namespace WebCore