Add samples to Viewer.

samplecode/SampleAtlas.cpp

 /*
  * Copyright 2015 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"
@@ skipping 214 matching lines @@
             switch (uni) {
                 case 'C': fDrawable->toggleUseColors(); this->inval(nullptr); return true;
                 default: break;
             }
         }
         return this->INHERITED::onQuery(evt);
     }
 
     void onDrawContent(SkCanvas* canvas) override {
         canvas->drawDrawable(fDrawable);
-        this->inval(nullptr);
     }
 
+    bool onAnimate(const SkAnimTimer&) override {
+        return true;
+    }
 #if 0
     // TODO: switch over to use this for our animation
     bool onAnimate(const SkAnimTimer& timer) override {
         SkScalar angle = SkDoubleToScalar(fmod(timer.secs() * 360 / 24, 360));
         fAnimatingDrawable->setSweep(angle);
         return true;
     }
 #endif
 
 private:
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_SAMPLE( return new DrawAtlasView("DrawAtlas", draw_atlas); )
 DEF_SAMPLE( return new DrawAtlasView("DrawAtlasSim", draw_atlas_sim); )