[table] Stretching tables when needed due to self-alignment properties

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 ad19771f6b349521ea4d6cd01e048152b0b0e037..10101b4ed3a19b7e5ae21085f73c3799787745c5 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.h
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.h
@@ -1318,7 +1318,7 @@ class CORE_EXPORT LayoutBox : public LayoutBoxModelObject {
   void updateFromStyle() override;
 
   virtual ItemPosition selfAlignmentNormalBehavior() const {

[mstensho (USE GERRIT), 2017/02/22 13:37:04]

Is this about resolving align-self:auto? This method deserves some
documentation.

[jfernandez, 2017/03/02 11:12:58]

Well, not exactly. It's a virtual method to define the 'actual
behavior' of a new keyword that CSS Alignment spec editor added
to deal with the different alignment default behavior depending
on the layout model (flex, grid, regular blocks or absolute 
positioned). 

I think the name of the function is self-explanatory, once you
realize about the existence of this new 'normal' keyword. 

-    return ItemPositionStretch;
+    return ItemPositionStart;
   }
 
   // Returns false if it could not cheaply compute the extent (e.g. fixed