Relayout RenderObjects with viewport-percentage CSS properties when viewport size changes

Source/core/rendering/RenderView.cpp

Index: Source/core/rendering/RenderView.cpp
diff --git a/Source/core/rendering/RenderView.cpp b/Source/core/rendering/RenderView.cpp
index 44cc1188cd44e9aa2527bb555fce1da9d7224cce..acd388fc22698e67b7ed6e46781c614a31277600 100644
--- a/Source/core/rendering/RenderView.cpp
+++ b/Source/core/rendering/RenderView.cpp
@@ -319,13 +319,16 @@ void RenderView::layout()
             if ((child->isBox() && toRenderBox(child)->hasRelativeLogicalHeight())
                     || child->style()->logicalHeight().isPercent()
                     || child->style()->logicalMinHeight().isPercent()
-                    || child->style()->logicalMaxHeight().isPercent()
-                    || child->style()->logicalHeight().isViewportPercentage()
-                    || child->style()->logicalMinHeight().isViewportPercentage()
-                    || child->style()->logicalMaxHeight().isViewportPercentage())
+                    || child->style()->logicalMaxHeight().isPercent())
                 layoutScope.setChildNeedsLayout(child);
         }
 
+        if (m_viewportPercentageStyleObjects) {
+            ViewportPercentageStyleObjectSet::const_iterator end = m_viewportPercentageStyleObjects->end();
+            for (ViewportPercentageStyleObjectSet::const_iterator it = m_viewportPercentageStyleObjects->begin(); it != end; ++it)
+                layoutScope.setChildNeedsLayout(*it);
+        }
+
         if (document().svgExtensions())
             document().accessSVGExtensions()->invalidateSVGRootsWithRelativeLengthDescendents(&layoutScope);
     }
@@ -1236,6 +1239,20 @@ LayoutUnit RenderView::viewportPercentageMax(float percentage) const
         * percentage / 100.f;
 }
 
+void RenderView::addViewportPercentageStyleObject(RenderObject* object)
+{
+    if (!m_viewportPercentageStyleObjects)
+        m_viewportPercentageStyleObjects = adoptPtr(new ViewportPercentageStyleObjectSet);
+
+    m_viewportPercentageStyleObjects->add(object);

[leviw_travelin_and_unemployed, 2013/10/25 20:30:35]

Can you add asserts that we aren't double-adding or double-removing objects?

+}
+
+void RenderView::removeViewportPercentageStyleObject(RenderObject* object)
+{
+    if (m_viewportPercentageStyleObjects)
+        m_viewportPercentageStyleObjects->remove(object);
+}
+
 FragmentationDisabler::FragmentationDisabler(RenderObject* root)
 {
     RenderView* renderView = root->view();