Update PRESUBMIT files for first round of ng trybots

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 2c405655b6c9962dd0c5310942594c013728f168..ee872e269c047ec2b64fafdb93537f3d7bc0149f 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -1621,17 +1621,21 @@ def GetDefaultTryConfigs(bots=None):
       'linux_chromium_gn_dbg': ['compile'],
       'linux_chromium_gn_rel': ['defaulttests'],
       'linux_chromium_rel': ['defaulttests'],
+      'linux_chromium_rel_ng': ['defaulttests'],
       'linux_chromium_clang_dbg': ['defaulttests'],
       'linux_gpu': ['defaulttests'],
       'linux_nacl_sdk_build': ['compile'],
       'mac_chromium_compile_dbg': ['defaulttests'],
       'mac_chromium_rel': ['defaulttests'],

[Sergiy Byelozyorov, 2014/10/30 10:16:40]

Why keep the old ones?

[Paweł Hajdan Jr., 2014/10/30 10:19:10]

This helps avoid a possible presubmit crash with a key error here. The builders
will eventually be removed.

[Sergiy Byelozyorov, 2014/10/30 10:39:24]

Can you elaborate please? Why would presubmit use old key?

[Paweł Hajdan Jr., 2014/10/30 10:48:59]

Please see "dereference" on line 1645 and trace back. Crashes like this have
happened in the past. I don't see a downside of keeping *still existing* builder
names in this dict. Feel free to elaborate more about possible problem you see
here.

[Sergiy Byelozyorov, 2014/10/30 10:52:57]

The downside is keeping dead code. But I see now how can this result in a crash.

+      'mac_chromium_rel_ng': ['defaulttests'],
       'mac_gpu': ['defaulttests'],
       'mac_nacl_sdk_build': ['compile'],
       'win_chromium_compile_dbg': ['defaulttests'],
       'win_chromium_dbg': ['defaulttests'],
       'win_chromium_rel': ['defaulttests'],
+      'win_chromium_rel_ng': ['defaulttests'],
       'win_chromium_x64_rel': ['defaulttests'],
+      'win_chromium_x64_rel_ng': ['defaulttests'],
       'win_gpu': ['defaulttests'],
       'win_nacl_sdk_build': ['compile'],
       'win8_chromium_rel': ['defaulttests'],
@@ -1681,12 +1685,12 @@ def GetPreferredTryMasters(project, change):
   if all(re.search(r'\.(m|mm)$|(^|[\\\/_])mac[\\\/_.]', f) for f in files):
     return GetDefaultTryConfigs([
         'mac_chromium_compile_dbg',
-        'mac_chromium_rel',
+        'mac_chromium_rel_ng',
     ])
   if all(re.search('(^|[/_])win[/_.]', f) for f in files):
     return GetDefaultTryConfigs([
         'win_chromium_dbg',
-        'win_chromium_rel',
+        'win_chromium_rel_ng',
         'win8_chromium_rel',
     ])
   if all(re.search(r'(^|[\\\/_])android[\\\/_.]', f) for f in files):
@@ -1712,14 +1716,14 @@ def GetPreferredTryMasters(project, change):
       'linux_chromium_clang_dbg',
       'linux_chromium_gn_dbg',
       'linux_chromium_gn_rel',
-      'linux_chromium_rel',
+      'linux_chromium_rel_ng',
       'linux_gpu',
       'mac_chromium_compile_dbg',
-      'mac_chromium_rel',
+      'mac_chromium_rel_ng',
       'mac_gpu',
       'win_chromium_compile_dbg',
-      'win_chromium_rel',
-      'win_chromium_x64_rel',
+      'win_chromium_rel_ng',
+      'win_chromium_x64_rel_ng',
       'win_gpu',
       'win8_chromium_rel',
   ]