Add versions of isPointIn*() that take a Path parameter.

Source/core/html/canvas/CanvasRenderingContext2D.idl

Index: Source/core/html/canvas/CanvasRenderingContext2D.idl
diff --git a/Source/core/html/canvas/CanvasRenderingContext2D.idl b/Source/core/html/canvas/CanvasRenderingContext2D.idl
index 8c8eb6eca983c6696f5d45193697ee64d148cd64..840d3b5113417b9413f55a5b342502b43d958772 100644
--- a/Source/core/html/canvas/CanvasRenderingContext2D.idl
+++ b/Source/core/html/canvas/CanvasRenderingContext2D.idl
@@ -88,8 +88,16 @@ interface CanvasRenderingContext2D : CanvasRenderingContext {
     [RuntimeEnabled=ExperimentalCanvasFeatures, RaisesException] void clip(Path? path);
     void clip(CanvasWindingRule winding);
     [RuntimeEnabled=ExperimentalCanvasFeatures, RaisesException] void clip(Path? path, CanvasWindingRule winding);
-    boolean isPointInPath(float x, float y, optional CanvasWindingRule winding);
+
+    // FIXME: Simplify these using optional CanvasWindingRule once crbug.com/339000 gets fixed.
+    boolean isPointInPath(float x, float y);
+    [RuntimeEnabled=ExperimentalCanvasFeatures, RaisesException] boolean isPointInPath(Path? path, float x, float y);
+    boolean isPointInPath(float x, float y, CanvasWindingRule winding);
+    [RuntimeEnabled=ExperimentalCanvasFeatures, RaisesException] boolean isPointInPath(Path? path, float x, float y, CanvasWindingRule winding);
+
+    // FIXME: Simplify these using optional CanvasWindingRule once crbug.com/339000 gets fixed.
     boolean isPointInStroke(float x, float y);
+    [RuntimeEnabled=ExperimentalCanvasFeatures, RaisesException] boolean isPointInStroke(Path? path, float x, float y);
 
     // text
     attribute DOMString font;