Fix image map focus ring painting

third_party/WebKit/Source/core/html/HTMLAreaElement.h

Index: third_party/WebKit/Source/core/html/HTMLAreaElement.h
diff --git a/third_party/WebKit/Source/core/html/HTMLAreaElement.h b/third_party/WebKit/Source/core/html/HTMLAreaElement.h
index 2fd276aefd03775f6ade306d474e726df01f6ab2..32e166a9550ab0e8dc03185ec3894e6dcca530b2 100644
--- a/third_party/WebKit/Source/core/html/HTMLAreaElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLAreaElement.h
@@ -40,10 +40,10 @@ public:
 
     bool isDefault() const { return m_shape == Default; }
 
-    bool pointInArea(LayoutPoint, const LayoutSize& containerSize);
+    bool pointInArea(const LayoutPoint&, const LayoutObject*) const;
 
-    LayoutRect computeRect(const LayoutObject*) const;
-    Path computePath(const LayoutObject*) const;
+    LayoutRect computeAbsoluteRect(const LayoutObject*) const;

[Xianzhu, 2016/04/25 23:18:16]

I added back the parameter because the parameter is needed to identify the
container object in case that a map is referenced by multiple images.

+    Path getPath(const LayoutObject*) const;
 
     // The parent map's image.
     HTMLImageElement* imageElement() const;
@@ -60,12 +60,10 @@ private:
     void setFocus(bool) override;
 
     enum Shape { Default, Poly, Rect, Circle };
-    Path getRegion(const LayoutSize&) const;
-    void invalidateCachedRegion();
+    void invalidateCachedPath();
 
-    OwnPtr<Path> m_region;
+    mutable OwnPtr<Path> m_path;
     Vector<double> m_coords;
-    LayoutSize m_lastSize;
     Shape m_shape;
 };