Update DM to respect blacklists for tests

dm/DM.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "CrashHandler.h"
 #include "DMJsonWriter.h"
 #include "DMSrcSink.h"
@@ skipping 656 matching lines @@
     struct : public skiatest::Reporter {
         void reportFailed(const skiatest::Failure& failure) override {
             fail(failure.toString());
             JsonWriter::AddTestFailure(failure);
         }
         bool allowExtendedTest() const override {
             return FLAGS_pathOpsExtended;
         }
         bool verbose() const override { return FLAGS_veryVerbose; }
     } reporter;
+
+    SkString note;
+    SkString whyBlacklisted = is_blacklisted("_", "tests", "_", test->name);
+    if (!whyBlacklisted.isEmpty()) {
+        note.appendf(" (--blacklist %s)", whyBlacklisted.c_str());
+    }
+
     WallTimer timer;
     timer.start();
-    if (!FLAGS_dryRun) {
+    if (!FLAGS_dryRun && whyBlacklisted.isEmpty()) {
         start("unit", "test", "", test->name);
         GrContextFactory factory;
         if (FLAGS_pre_log) {
             SkDebugf("\nRunning test %s", test->name);
         }
         test->proc(&reporter, &factory);
     }
     timer.end();
-    done(timer.fWall, "unit", "test", "", test->name, "", "");
+    done(timer.fWall, "unit", "test", "", test->name, note, "");
 }
 
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
 
 // If we're isolating all GPU-bound work to one thread (the default), this function runs all that.
 static void run_enclave_and_gpu_tests(SkTArray<Task>* tasks) {
     run_enclave(tasks);
     for (int i = 0; i < gGPUTests.count(); i++) {
         run_test(&gGPUTests[i]);
     }
@@ skipping 107 matching lines @@
     }
     return 0;
 }
 
 #if !defined(SK_BUILD_FOR_IOS)
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return dm_main();
 }
 #endif