Add getCurrentClipPath() to SkCanvas.

src/core/SkCanvas.cpp

Index: src/core/SkCanvas.cpp
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index bdbcd3be740fbd79fd7cdae4c4a954d63a88b31c..fc288dbc1dc837740ddb93541fd43340015045f9 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -1793,6 +1793,35 @@ void SkCanvas::internal_private_getTotalClipAsPath(SkPath* path) const {
     (void)rgn.getBoundaryPath(path);
 }
 
+void SkCanvas::getCurrentClipPath(SkPath* path) const {
+
+    if (!path)
+        return;
+
+    const SkClipStack* clipStack = getClipStack();
+    SkClipStack::Iter iter(*clipStack, SkClipStack::Iter::kBottom_IterStart);
+    const SkClipStack::Element* element;
+
+    SkPath totalClipPath;
+    totalClipPath.setFillType(SkPath::kInverseEvenOdd_FillType);
+
+    while ((element = iter.next())) {
+
+        SkClipStack::Element::Type type = element->getType();
+        SkPath clipPath;
+        if (type != SkClipStack::Element::kEmpty_Type)
+            element->asPath(&clipPath);
+
+        SkRegion::Op elementOp = element->getOp();
+        if (elementOp == SkRegion::kReplace_Op)
+            totalClipPath = clipPath;
+        else
+            Op(totalClipPath, clipPath, (SkPathOp)elementOp, &totalClipPath);
+    }
+
+    *path = totalClipPath;
+}
+
 GrRenderTarget* SkCanvas::internal_private_accessTopLayerRenderTarget() {
     SkBaseDevice* dev = this->getTopDevice();
     return dev ? dev->accessRenderTarget() : NULL;