mb: Add compile targets used by V8 trybot

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 685 matching lines @@
     "type": "additional_compile_target",
   },
   "ozone_unittests": {
     "label": "//ui/ozone:ozone_unittests",
     "type": "console_test_launcher",
   },
   "ozone_gl_unittests": {
     "label": "//ui/ozone/gl:ozone_gl_unittests",
     "type": "console_test_launcher",
   },
+  "pdfium_test": {
+    "label": "//third_party/pdfium/samples:pdfium_test",
+    "type": "additional_compile_target",

[Michael Achenbach, 2016/09/19 12:44:40]

This is probably not just an additional compile target, but this should be
enough to unbreak our compile-only bot.

+  },
   "peerconnection_unittests": {
     "label": "//webrtc/api:peerconnection_unittests",
     "type": "console_test_launcher",
   },
+  "postmortem-metadata": {

[Michael Achenbach, 2016/09/19 12:44:40]

I'm wondering if some of these mappings should not live in the respective
subprojects?

+    "label": "//v8:postmortem-metadata",
+    "type": "additional_compile_target",
+  },
   "ppapi_unittests": {
     "label": "//ppapi:ppapi_unittests",
     "type": "console_test_launcher",
   },
   "printing_unittests": {
     "label": "//printing:printing_unittests",
     "type": "console_test_launcher",
   },
   "remoting_unittests": {
     "label": "//remoting:remoting_unittests",
@@ skipping 202 matching lines @@
   },
   "wtf_unittests": {
     "label": "//third_party/WebKit/Source/wtf:wtf_unittests",
     "type": "console_test_launcher",
   },
   "xmllite_xmpp_unittests": {
     "label": "//webrtc:xmllite_xmpp_unittests",
     "type": "console_test_launcher",
   }
 }