In gm, install drawFilter for pipe and tiledPipe.

gm/gmmain.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.
  */
 
 /*
  * Code for the "gm" (Golden Master) rendering comparison tool.
  *
@@ skipping 883 matching lines @@
 
     ErrorBitfield test_pipe_playback(GM* gm,
                                      const ConfigData& gRec,
                                      const SkBitmap& referenceBitmap) {
         ErrorBitfield errors = kEmptyErrorBitfield;
         for (size_t i = 0; i < SK_ARRAY_COUNT(gPipeWritingFlagCombos); ++i) {
             SkBitmap bitmap;
             SkISize size = gm->getISize();
             setup_bitmap(gRec, size, &bitmap);
             SkCanvas canvas(bitmap);
+            installFilter(&canvas);

[epoger, 2013/03/15 15:27:16]

As discussed in
https://codereview.chromium.org/12632015/diff/1006/gm/gmmain.cpp#newcode898 , it
disturbs me that this error went unnoticed, and ideally
this fix would be accompanied by self-test improvements that exercise it and
related behavior.

It can be pretty frustrating when our tools don't detect regressions... that's
why I've been adding self-tests to exercise all new gm behavior.  But that does
take time away from other work, so it's a balancing act.

             PipeController pipeController(&canvas);
             SkGPipeWriter writer;
             SkCanvas* pipeCanvas = writer.startRecording(
               &pipeController, gPipeWritingFlagCombos[i].flags);
             invokeGM(gm, pipeCanvas, false, false);
             complete_bitmap(&bitmap);
             writer.endRecording();
             SkString string("-pipe");
             string.append(gPipeWritingFlagCombos[i].name);
             errors |= compare_test_results_to_reference_bitmap(
                 gm, gRec, string.c_str(), bitmap, &referenceBitmap);
             if (errors != kEmptyErrorBitfield) {
                 break;
             }
         }
         return errors;
     }
 
     ErrorBitfield test_tiled_pipe_playback(
       GM* gm, const ConfigData& gRec, const SkBitmap& referenceBitmap) {
         ErrorBitfield errors = kEmptyErrorBitfield;
         for (size_t i = 0; i < SK_ARRAY_COUNT(gPipeWritingFlagCombos); ++i) {
             SkBitmap bitmap;
             SkISize size = gm->getISize();
             setup_bitmap(gRec, size, &bitmap);
             SkCanvas canvas(bitmap);
+            installFilter(&canvas);
             TiledPipeController pipeController(bitmap);
             SkGPipeWriter writer;
             SkCanvas* pipeCanvas = writer.startRecording(
               &pipeController, gPipeWritingFlagCombos[i].flags);
             invokeGM(gm, pipeCanvas, false, false);
             complete_bitmap(&bitmap);
             writer.endRecording();
             SkString string("-tiled pipe");
             string.append(gPipeWritingFlagCombos[i].name);
             errors |= compare_test_results_to_reference_bitmap(
@@ skipping 780 matching lines @@
     SkGraphics::Term();
 
     return (0 == testsFailed) ? 0 : -1;
 }
 
 #if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif