FontCachePurgePreventer is needed when computing MinPreferredWidth

third_party/WebKit/Source/core/layout/ng/layout_ng_block_flow.cc

Index: third_party/WebKit/Source/core/layout/ng/layout_ng_block_flow.cc
diff --git a/third_party/WebKit/Source/core/layout/ng/layout_ng_block_flow.cc b/third_party/WebKit/Source/core/layout/ng/layout_ng_block_flow.cc
index bcfe05417fb3cb2000ac27b23972a769be8b5c16..eb6d1bccd17d2cfb68f4a7fda0363b61da682707 100644
--- a/third_party/WebKit/Source/core/layout/ng/layout_ng_block_flow.cc
+++ b/third_party/WebKit/Source/core/layout/ng/layout_ng_block_flow.cc
@@ -7,6 +7,7 @@
 #include "core/layout/LayoutAnalyzer.h"
 #include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_fragment.h"
+#include "core/layout/ng/ng_min_max_content_size.h"
 
 namespace blink {
 
@@ -50,4 +51,20 @@ void LayoutNGBlockFlow::layoutBlock(bool relayoutChildren) {
   clearNeedsLayout();
 }
 
+void LayoutNGBlockFlow::computeIntrinsicLogicalWidths(
+    LayoutUnit& minLogicalWidth,
+    LayoutUnit& maxLogicalWidth) const {
+  // TODO(layout-dev): This should be created in the constructor once instead.
+  // See also the comment in layoutBlock().
+  NGBlockNode* node = new NGBlockNode(const_cast<LayoutNGBlockFlow*>(this));
+  if (!node->CanUseNewLayout()) {
+    LayoutBlockFlow::computeIntrinsicLogicalWidths(minLogicalWidth,
+                                                   maxLogicalWidth);
+    return;
+  }
+  MinMaxContentSize sizes = node->ComputeMinMaxContentSize();
+  minLogicalWidth = sizes.min_content;
+  maxLogicalWidth = sizes.max_content;
+}
+
 }  // namespace blink