FontCachePurgePreventer is needed when computing MinPreferredWidth

third_party/WebKit/Source/web/WebViewImpl.cpp

Index: third_party/WebKit/Source/web/WebViewImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebViewImpl.cpp b/third_party/WebKit/Source/web/WebViewImpl.cpp
index aef52af48e53a6930ce04d0d51d81f56ff3a8fa9..8be130b818fed39af4c25295b9658da8a531e2c9 100644
--- a/third_party/WebKit/Source/web/WebViewImpl.cpp
+++ b/third_party/WebKit/Source/web/WebViewImpl.cpp
@@ -3257,6 +3257,8 @@ WebSize WebViewImpl::contentsPreferredMinimumSize() {
       !document->documentElement() || !document->documentElement()->layoutBox())
     return WebSize();
 
+  // Needed for computing minPreferredWidth.
+  FontCachePurgePreventer fontCachePurgePreventer;
   int widthScaled = document->layoutViewItem()
                         .minPreferredLogicalWidth()
                         .round();  // Already accounts for zoom.