add sample for arcTo

samplecode/SampleCode.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SampleCode_DEFINED
 #define SampleCode_DEFINED
 
 #include "SkColor.h"
 #include "SkEvent.h"
 #include "SkKey.h"
 #include "SkView.h"
 #include "SkOSMenu.h"
 class GrContext;
 
+#define DEF_SAMPLE(code) \
+    static SkView*          SK_MACRO_APPEND_LINE(F_)() { code } \
+    static SkViewRegister   SK_MACRO_APPEND_LINE(R_)(SK_MACRO_APPEND_LINE(F_));
+
+
 class SampleCode {
 public:
     static bool KeyQ(const SkEvent&, SkKey* outKey);
     static bool CharQ(const SkEvent&, SkUnichar* outUni);
 
     static bool TitleQ(const SkEvent&);
     static void TitleR(SkEvent*, const char title[]);
     static bool RequestTitle(SkView* view, SkString* title);
 
     static bool PrefSizeQ(const SkEvent&);
@@ skipping 111 matching lines @@
     SkOSMenu::TriState fPipeState;
     SkColor fBGColor;
 
 private:
     int fRepeatCount;
 
     typedef SkView INHERITED;
 };
 
 #endif