Fix up that no render SVG shape when change clip-path to visible after hidden.

third_party/WebKit/Source/core/layout/svg/SVGResourcesCache.cpp

Index: third_party/WebKit/Source/core/layout/svg/SVGResourcesCache.cpp
diff --git a/third_party/WebKit/Source/core/layout/svg/SVGResourcesCache.cpp b/third_party/WebKit/Source/core/layout/svg/SVGResourcesCache.cpp
index 5422c57f26f73dbef20bcc70007e23e968304288..4fc3a4244f4c2329fadf44405825d3b3297b96ff 100644
--- a/third_party/WebKit/Source/core/layout/svg/SVGResourcesCache.cpp
+++ b/third_party/WebKit/Source/core/layout/svg/SVGResourcesCache.cpp
@@ -128,8 +128,11 @@ void SVGResourcesCache::clientStyleChanged(LayoutObject* layoutObject,
     cache.addResourcesFromLayoutObject(layoutObject, newStyle);
   }
 
+  bool needLayout = false;
+  needLayout |= diff.needsPaintInvalidation();

[fs, 2017/01/23 13:03:40]

Now we'll trigger a lot more layout than we need to. We don't want to do that.
This is why I suggested (I think) that we pass the StyleDifference to
markForLayoutAndParentResourceInvalidation, and then use that in the relevant
call when we know we're a descendant of a LayoutSVGResourceContainer.

+
   LayoutSVGResourceContainer::markForLayoutAndParentResourceInvalidation(
-      layoutObject, false);
+      layoutObject, needLayout);
 }
 
 void SVGResourcesCache::clientWasAddedToTree(LayoutObject* layoutObject,