Remove explicit call to build.

bin/cbuildbot.py

Index: bin/cbuildbot.py
diff --git a/bin/cbuildbot.py b/bin/cbuildbot.py
index 8424e9e527b18af1dc7b48487963cc619ade710b..be066b0dbd7d9b1a8c4866118b8e526d1d56a73d 100755
--- a/bin/cbuildbot.py
+++ b/bin/cbuildbot.py
@@ -367,14 +367,6 @@ def _Build(buildroot, emptytree):
   RunCommand(cmd, cwd=cwd, enter_chroot=True)
 
 
-def _BuildChrome(buildroot, board, chrome_atom_to_build):
-  """Wrapper for emerge call to build Chrome."""
-  cwd = os.path.join(buildroot, 'src', 'scripts')
-  RunCommand(['emerge-%s' % board,
-              '=%s' % chrome_atom_to_build],
-             cwd=cwd, enter_chroot=True)
-
-
 def _EnableLocalAccount(buildroot):
   cwd = os.path.join(buildroot, 'src', 'scripts')
   # Set local account for test images.
@@ -700,9 +692,6 @@ def main():
     if options.sync:
       _Build(buildroot, emptytree)
 
-    if chrome_atom_to_build:
-      _BuildChrome(buildroot, buildconfig['board'], chrome_atom_to_build)
-
     if buildconfig['unittests'] and options.tests:
       _RunUnitTests(buildroot)