Add a cast audio bot.

tools/mb/mb_config.pyl

Index: tools/mb/mb_config.pyl
diff --git a/tools/mb/mb_config.pyl b/tools/mb/mb_config.pyl
index 34fb9becf58694097e918a48ded2b8de80df8f0c..96d0ea46a7ec93b4980aa8ee7fa1e7748ab51d67 100644
--- a/tools/mb/mb_config.pyl
+++ b/tools/mb/mb_config.pyl
@@ -247,11 +247,13 @@
       'Blimp Linux (dbg)': '//build/args/bots/chromium.linux/blimp_linux_dbg.gn',
       'Cast Android (dbg)': 'android_cast_debug_static_bot',
       'Cast Linux': 'cast_release_bot',
+      'Cast Audio Linux': 'cast_audio_release_bot',
       'Linux Builder (dbg)': 'debug_bot',
       'Linux Builder (dbg)(32)': 'debug_bot_x86',
       'Linux Builder': 'release_bot',
       # Trusty bots.
       'Cast Linux Trusty': 'cast_release_bot',
+      'Cast Audio Linux Trusty': 'cast_audio_release_bot',

[Dirk Pranke, 2016/12/01 00:38:39]

Is just Trusty enough? Are you expecting 'Cast Audio Linux' to be Precise, and
if so, why do you need to support that?

(We're trying to get everything onto at least Trusty).

       'Linux Builder Trusty (dbg)': 'debug_bot',
       'Linux Builder Trusty (dbg)(32)': 'debug_bot_x86',
       'Linux Builder Trusty': 'release_bot',
@@ -502,6 +504,7 @@
       'Chromium Linux Codesearch Builder': 'codesearch',
       'ChromiumOS Codesearch Builder': 'codesearch',
       'cast_shell_linux': 'cast_release_trybot',
+      'cast_shell_audio_linux': 'cast_audio_release_trybot',
       'chromeos_amd64-generic_chromium_compile_only_ng': 'cros_chrome_sdk',
       'chromeos_daisy_chromium_compile_only_ng': 'cros_chrome_sdk',
       'chromeos_x86-generic_chromium_compile_only_ng': 'cros_chrome_sdk',
@@ -552,6 +555,7 @@
 
       # Trusty trybot
       'cast_shell_linux_trusty': 'cast_release_trybot',
+      'cast_shell_audio_linux_trusty': 'cast_audio_release_trybot',
       'linux_arm_trusty': 'release_trybot_arm',
       'linux_chromium_asan_rel_ng_trusty': 'asan_lsan_release_trybot',
       'linux_chromium_browser_side_navigation_rel_trusty': 'release_trybot',
@@ -938,6 +942,14 @@
       'cast', 'release_trybot',
     ],
 
+    'cast_audio_release_bot': [
+      'cast', 'cast_audio', 'release_bot',
+    ],
+
+    'cast_audio_release_trybot': [
+      'cast', 'cast_audio', 'release_trybot',
+    ],
+
     'cfi_full_cfi_diag_release_static': [
       'cfi_full', 'cfi_diag', 'release', 'static',
     ],
@@ -1496,6 +1508,10 @@
       'gn_args': 'is_chromecast=true',
     },
 
+    'cast_audio': {
+      'gn_args': 'is_cast_audio_only=true enable_webrtc=false'
+    },
+
     'cfi': {
       'gn_args': 'is_cfi=true',
     },