Remove the SkCanvas comment API

tests/CanvasTest.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /*  Description:
  *      This test defines a series of elementatry test steps that perform
  *      a single or a small group of canvas API calls. Each test step is
@@ skipping 330 matching lines @@
 SIMPLE_TEST_STEP(Translate, translate(SkIntToScalar(1), SkIntToScalar(2)));
 SIMPLE_TEST_STEP(Scale, scale(SkIntToScalar(1), SkIntToScalar(2)));
 SIMPLE_TEST_STEP(Rotate, rotate(SkIntToScalar(1)));
 SIMPLE_TEST_STEP(Skew, skew(SkIntToScalar(1), SkIntToScalar(2)));
 SIMPLE_TEST_STEP(Concat, concat(d.fMatrix));
 SIMPLE_TEST_STEP(SetMatrix, setMatrix(d.fMatrix));
 SIMPLE_TEST_STEP(ClipRect, clipRect(d.fRect));
 SIMPLE_TEST_STEP(ClipPath, clipPath(d.fPath));
 SIMPLE_TEST_STEP(ClipRegion, clipRegion(d.fRegion, SkRegion::kReplace_Op));
 SIMPLE_TEST_STEP(Clear, clear(d.fColor));
-SIMPLE_TEST_STEP(BeginGroup, beginCommentGroup(d.fText.c_str()));
-SIMPLE_TEST_STEP(AddComment, addComment(d.fText.c_str(), d.fText.c_str()));
-SIMPLE_TEST_STEP(EndGroup, endCommentGroup());
 
 ///////////////////////////////////////////////////////////////////////////////
 // Complex test steps
 
 static void SaveMatrixClipStep(SkCanvas* canvas, const TestData& d,
                                skiatest::Reporter* reporter, CanvasTestStep* testStep) {
     int saveCount = canvas->getSaveCount();
     canvas->save();
     canvas->translate(SkIntToScalar(1), SkIntToScalar(2));
     canvas->clipRegion(d.fRegion);
@@ skipping 406 matching lines @@
     canvas.restore();
     canvas.save();
     path.moveTo(5, 5);
     canvas.clipPath(path);
     canvas.restore();
     canvas.save();
     path.moveTo(7, 7);
     canvas.clipPath(path);  // should not assert here
     canvas.restore();
 }