Attempt 2 at:...

app/gfx/path_win.cc

Index: app/gfx/path_win.cc
===================================================================
--- app/gfx/path_win.cc	(revision 30929)
+++ app/gfx/path_win.cc	(working copy)
@@ -8,7 +8,7 @@
 
 namespace gfx {
 
-HRGN Path::CreateHRGN() const {
+HRGN Path::CreateNativeRegion() const {
   int point_count = getPoints(NULL, 0);
   scoped_array<SkPoint> points(new SkPoint[point_count]);
   getPoints(points.get(), point_count);
@@ -21,4 +21,25 @@
   return ::CreatePolygonRgn(windows_points.get(), point_count, ALTERNATE);
 }
 
+// static
+NativeRegion Path::IntersectRegions(NativeRegion r1, NativeRegion r2) {
+  HRGN dest = CreateRectRgn(0, 0, 1, 1);
+  CombineRgn(dest, r1, r2, RGN_AND);
+  return dest;
+}
+
+// static
+NativeRegion Path::CombineRegions(NativeRegion r1, NativeRegion r2) {
+  HRGN dest = CreateRectRgn(0, 0, 1, 1);
+  CombineRgn(dest, r1, r2, RGN_OR);
+  return dest;
+}
+
+// static
+NativeRegion Path::SubtractRegion(NativeRegion r1, NativeRegion r2) {
+  HRGN dest = CreateRectRgn(0, 0, 1, 1);
+  CombineRgn(dest, r1, r2, RGN_DIFF);
+  return dest;
+}
+
 }  // namespace gfx