Just use one version of the scripts in both the browser and in SkV8.

experimental/SkV8Example/Path.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  */
 
 #include "Path.h"
@@ skipping 24 matching lines @@
 
     Handle<Context> context = gGlobal->getContext();
 
     // Enter the scope so all operations take place in the scope.
     Context::Scope contextScope(context);
 
     Local<FunctionTemplate> constructor = FunctionTemplate::New(
             Path::ConstructPath);
     constructor->InstanceTemplate()->SetInternalFieldCount(1);
 
-    ADD_METHOD("close", ClosePath);
+    ADD_METHOD("closePath", ClosePath);
     ADD_METHOD("moveTo", MoveTo);
     ADD_METHOD("lineTo", LineTo);
     ADD_METHOD("quadraticCurveTo", QuadraticCurveTo);
     ADD_METHOD("bezierCurveTo", BezierCurveTo);
     ADD_METHOD("arc", Arc);
     ADD_METHOD("rect", Rect);
+    ADD_METHOD("oval", Oval);
 
     context->Global()->Set(String::New("Path"), constructor->GetFunction());
 }
 
 Path* Path::Unwrap(const v8::FunctionCallbackInfo<Value>& args) {
     Handle<External> field = Handle<External>::Cast(
             args.This()->GetInternalField(0));
     void* ptr = field->Value();
     return static_cast<Path*>(ptr);
 }
@@ skipping 120 matching lines @@
 
     SkRect rect = {
         SkDoubleToScalar(x),
         SkDoubleToScalar(y),
         SkDoubleToScalar(x) + SkDoubleToScalar(w),
         SkDoubleToScalar(y) + SkDoubleToScalar(h)
     };
     Path* path = Unwrap(args);
     path->fSkPath.addRect(rect);
 }
+
+void Path::Oval(const v8::FunctionCallbackInfo<Value>& args) {
+    if (args.Length() != 4 && args.Length() != 5) {
+        args.GetIsolate()->ThrowException(
+                v8::String::NewFromUtf8(
+                        args.GetIsolate(), "Error: 4 or 5 args required."));
+        return;
+    }
+    double x          = args[0]->NumberValue();
+    double y          = args[1]->NumberValue();
+    double radiusX    = args[2]->NumberValue();
+    double radiusY    = args[3]->NumberValue();
+    SkPath::Direction dir = SkPath::kCW_Direction;
+    if (args.Length() == 5 && !args[4]->BooleanValue()) {
+        dir = SkPath::kCCW_Direction;
+    }
+    Path* path = Unwrap(args);
+    SkRect rect = {
+        SkDoubleToScalar(x-radiusX),
+        SkDoubleToScalar(y-radiusX),
+        SkDoubleToScalar(x+radiusY),
+        SkDoubleToScalar(y+radiusY)
+    };
+
+    path->fSkPath.addOval(rect, dir);
+}