allow GMs to animate

gm/gm.cpp

 /*
  * 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 "gm.h"
 
 using namespace skiagm;
@@ skipping 33 matching lines @@
     if (fShortName.size() == 0) {
         fShortName = this->onShortName();
     }
     return fShortName.c_str();
 }
 
 void GM::setBGColor(SkColor color) {
     fBGColor = color;
 }
 
+bool GM::animatePulse(SkMSec curr, SkMSec prev) {
+    return this->onAnimatePulse(curr, prev);
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////////
+
 void GM::onDrawBackground(SkCanvas* canvas) {
     canvas->drawColor(fBGColor, SkXfermode::kSrc_Mode);
 }
 
 void GM::drawSizeBounds(SkCanvas* canvas, SkColor color) {
     SkISize size = this->getISize();
     SkRect r = SkRect::MakeWH(SkIntToScalar(size.width()),
                               SkIntToScalar(size.height()));
     SkPaint paint;
     paint.setColor(color);
     canvas->drawRect(r, paint);
 }
 
 // need to explicitly declare this, or we get some weird infinite loop llist
 template GMRegistry* GMRegistry::gHead;
 
 void skiagm::SimpleGM::onDraw(SkCanvas* canvas) {
     fDrawProc(canvas);
 }
 
 SkISize skiagm::SimpleGM::onISize() {
     return fSize;
 }
 
 SkString skiagm::SimpleGM::onShortName() {
     return fName;
 }
+