Add support for printing multicol containers, and enable it.

third_party/WebKit/Source/core/layout/ViewFragmentationContext.cpp

Index: third_party/WebKit/Source/core/layout/ViewFragmentationContext.cpp
diff --git a/third_party/WebKit/Source/core/layout/ViewFragmentationContext.cpp b/third_party/WebKit/Source/core/layout/ViewFragmentationContext.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..6f6d2df2d6609aebdad6c3e4ae607a23e6efd18f
--- /dev/null
+++ b/third_party/WebKit/Source/core/layout/ViewFragmentationContext.cpp
@@ -0,0 +1,31 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+
+#include "core/layout/ViewFragmentationContext.h"
+
+#include "core/layout/LayoutView.h"
+
+namespace blink {
+
+bool ViewFragmentationContext::isFragmentainerLogicalHeightKnown()
+{
+    ASSERT(m_view.pageLogicalHeight());
+    return true;
+}
+
+LayoutUnit ViewFragmentationContext::fragmentainerLogicalHeightAt(LayoutUnit)
+{
+    ASSERT(m_view.pageLogicalHeight());
+    return m_view.pageLogicalHeight();
+}
+
+LayoutUnit ViewFragmentationContext::remainingLogicalHeightAt(LayoutUnit blockOffset)
+{
+    LayoutUnit pageLogicalHeight = m_view.pageLogicalHeight();
+    return pageLogicalHeight - intMod(blockOffset, pageLogicalHeight);
+}
+
+} // namespace blink