Remove references to DrMemory from chromium repo.

testing/buildbot/gn_isolate_map.pyl

 ## Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # gn_isolate_map.pyl - A mapping of Ninja build target names to GN labels and
 # test type classifications for the tests that are run on the bots.
 #
 # This mapping is used by MB so that we can uniformly refer to test binaries
 # by their Ninja target names in the recipes and not need to worry about how
 # they are referred to in GN or GYP specifically (the GYP target name is pretty
@@ skipping 274 matching lines @@
     "type": "console_test_launcher",
   },
   "chromevox_tests": {
     "label": "//chrome/browser/resources/chromeos/chromevox:chromevox_tests",
     "type": "windowed_test_launcher",
   },
   "chromium_builder_asan": {
     "label": "//:chromium_builder_asan",
     "type": "additional_compile_target",
   },
-  "chromium_builder_dbg_drmemory_win": {
-    "label": "//:chromium_builder_dbg_drmemory_win",
-    "type": "additional_compile_target",
-  },
-  "chromium_builder_lkgr_drmemory_win": {
-    "label": "//:chromium_builder_lkgr_drmemory_win",
-    "type": "additional_compile_target",
-  },
   "chromium_builder_perf": {
     "label": "//:chromium_builder_perf",
     "type": "additional_compile_target",
   },
   "chromium_builder_tests": {
     "label": "//:chromium_builder_tests",
     "type": "additional_compile_target",
   },
   "chromium_swarm_tests": {
     "label": "//:chromium_swarm_tests",
@@ skipping 570 matching lines @@
   },
   "wm_unittests": {
     "label": "//ui/wm:wm_unittests",
     "type": "windowed_test_launcher",
   },
   "wtf_unittests": {
     "label": "//third_party/WebKit/Source/wtf:wtf_unittests",
     "type": "console_test_launcher",
   },
 }