[css-grid] Clearing override sizes before running grid's layout logic.

third_party/WebKit/Source/core/layout/LayoutBox.h

Index: third_party/WebKit/Source/core/layout/LayoutBox.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.h b/third_party/WebKit/Source/core/layout/LayoutBox.h
index 23357c67d69a9e8e33a61f7f1bd8c252eb1a106c..5e54de103d8f537d0030fa7a5d0e77b40fbbb539 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.h
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.h
@@ -544,6 +544,7 @@ public:
     bool hasOverrideLogicalContentWidth() const;
     void setOverrideLogicalContentHeight(LayoutUnit);
     void setOverrideLogicalContentWidth(LayoutUnit);
+    bool hasOverrideSize();
     void clearOverrideSize();
     void clearOverrideLogicalContentHeight();
     void clearOverrideLogicalContentWidth();
@@ -554,6 +555,7 @@ public:
     bool hasOverrideContainingBlockLogicalHeight() const;
     void setOverrideContainingBlockContentLogicalWidth(LayoutUnit);
     void setOverrideContainingBlockContentLogicalHeight(LayoutUnit);
+    bool hasContainingBlockOverrideSize();
     void clearContainingBlockOverrideSize();
     void clearOverrideContainingBlockContentLogicalHeight();