migrate more samples over to SkAnimTImer

samplecode/SamplePatch.cpp

Index: samplecode/SamplePatch.cpp
diff --git a/samplecode/SamplePatch.cpp b/samplecode/SamplePatch.cpp
index 83849a091e3ec535000d70e5e645e07eb9a498de..415368260eb7c6a4687b6c9830a77c9d604913cf 100644
--- a/samplecode/SamplePatch.cpp
+++ b/samplecode/SamplePatch.cpp
@@ -1,11 +1,12 @@
-
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
+
 #include "SampleCode.h"
+#include "SkAnimTimer.h"
 #include "SkView.h"
 #include "SkCanvas.h"
 #include "SkGradientShader.h"
@@ -221,13 +222,14 @@ const SkScalar DX = 20;
 const SkScalar DY = 0;
 
 class PatchView : public SampleView {
+    SkScalar    fAngle;
     SkShader*   fShader0;
     SkShader*   fShader1;
     SkIPoint    fSize0, fSize1;
     SkPoint     fPts[12];
 
 public:
-    PatchView() {
+    PatchView() : fAngle(0) {
         fShader0 = make_shader0(&fSize0);
         fSize1 = fSize0;
         if (fSize0.fX == 0 || fSize0.fY == 0) {
@@ -308,16 +310,18 @@ protected:
             paint.setShader(s)->unref();
         }
         if (true) {
-            static int gAngle;
             SkMatrix m;
-            m.setRotate(SkIntToScalar(gAngle++));
+            m.setRotate(fAngle);
             SkShader* s = SkShader::CreateLocalMatrixShader(paint.getShader(), m);
             paint.setShader(s)->unref();
         }
         patch.setBounds(fSize1.fX, fSize1.fY);
         drawpatches(canvas, paint, nu, nv, &patch);
+    }
 
-        this->inval(NULL);
+    bool onAnimate(const SkAnimTimer& timer) SK_OVERRIDE {
+        fAngle = timer.scaled(60, 360);
+        return true;
     }
 
     class PtClick : public Click {