Blimp: create MessageDispatcher class.

testing/buildbot/tryserver.chromium.linux.json

 {
   "android_chromium_gn_compile_dbg": {
     "additional_compile_targets": [
       "blimp",
       "chrome_public_apk",
       "chrome_public_test_apk",
       "content_shell_apk",
       "mandoline:all"
     ]
   },
@@ skipping 165 matching lines @@
       {
         "test": "app_list_unittests"
       },
       {
         "test": "aura_unittests"
       },
       {
         "test": "base_unittests"
       },
       {
+        "test": "blimp_common_unit_tests"

[nyquist, 2015/09/25 22:21:29]

I think you can move this to the real Android Tests bots now (both release and
debug)

[Kevin M, 2015/10/01 00:02:36]

What are the names of the bots?

[nyquist, 2015/10/01 00:07:13]

See here: https://codereview.chromium.org/1365823002/

Android GN
Android GN (dbg)
android_chromium_gn_compile_dbg
android_chromium_gn_compile_rel

Basically, add to both tryservers and normal servers. Preferrably both for linux
and android on both.

The main linux bots now run GN by default, so no need to use the GN-specific
bots for linux.

[Dirk Pranke, 2015/10/01 00:14:03]

Right, do not add these lines. The linux_chromium_gn_rel bots are going away,
because they're now redundant with the linux_chromium_rel_ng bots. (You don't
need to add entries for linux_chromium_rel_ng; it automatically uses the entries
in "Linux Tests" on chromium.linux).

[Kevin M, 2015/10/01 00:23:01]

OK, done.

nyquist@: It doesn't appear that Android GN (dbg) has any gtest targets at the
moment? It seems odd that I'd be creating a new test list for it.

[nyquist, 2015/10/01 00:26:53]

That's super odd. 'Android GN', does in fact have tests:
http://build.chromium.org/p/chromium.linux/builders/Android%20GN/builds/30846

I don't feel strongly either way I guess.

+      },
+      {
         "test": "cacheinvalidation_unittests"
       },
       {
         "test": "cast_unittests"
       },
       {
         "test": "cc_unittests"
       },
       {
         "test": "chromedriver_unittests"
@@ skipping 166 matching lines @@
         "name": "gyp_flag_compare",
         "script": "gyp_flag_compare.py"
       },
       {
         "name": "mojo_apptests",
         "script": "mojo_apptests.py"
       }
     ]
   }
 }