Use real revision mapping in bot_update module

scripts/slave/recipes/chromium.expected/full_chromium_chromiumos_Linux_ChromiumOS_Tests__dbg__2_.json

Index: scripts/slave/recipes/chromium.expected/full_chromium_chromiumos_Linux_ChromiumOS_Tests__dbg__2_.json
diff --git a/scripts/slave/recipes/chromium.expected/full_chromium_chromiumos_Linux_ChromiumOS_Tests__dbg__2_.json b/scripts/slave/recipes/chromium.expected/full_chromium_chromiumos_Linux_ChromiumOS_Tests__dbg__2_.json
index 437bac2550eca177a408a8c7b827c44d765609c9..b4058b9d45a55b4aa992ad048d90f03a2269e063 100644
--- a/scripts/slave/recipes/chromium.expected/full_chromium_chromiumos_Linux_ChromiumOS_Tests__dbg__2_.json
+++ b/scripts/slave/recipes/chromium.expected/full_chromium_chromiumos_Linux_ChromiumOS_Tests__dbg__2_.json
@@ -13,6 +13,8 @@
       "TestSlavename",
       "--spec",
       "cache_dir = None\nsolutions = [{'custom_vars': {'googlecode_url': 'svn://svn-mirror.golo.chromium.org/%s', 'nacl_trunk': 'svn://svn-mirror.golo.chromium.org/native_client/trunk', 'sourceforge_url': 'svn://svn-mirror.golo.chromium.org/%(repo)s', 'webkit_trunk': 'svn://svn-mirror.golo.chromium.org/blink/trunk'}, 'deps_file': 'DEPS', 'managed': True, 'name': 'src', 'url': 'svn://svn-mirror.golo.chromium.org/chrome/trunk/src'}]",
+      "--revision_mapping_file",
+      "{\"src\": \"got_revision\", \"src/native_client\": \"got_nacl_revision\", \"src/third_party/WebKit\": \"got_webkit_revision\", \"src/third_party/webrtc\": \"got_webrtc_revision\", \"src/tools/swarm_client\": \"got_swarm_client_revision\", \"src/tools/swarming_client\": \"got_swarming_client_revision\", \"src/v8\": \"got_v8_revision\"}",
       "--output_json",
       "/path/to/tmp/json"
     ],