Add a basic configuration (gclient sync + build) for pagespeed.

masters/master.client.webm/Makefile

+# -*- makefile -*-
+
+# This is a simple makefile which lives in a buildmaster/buildslave
+# directory (next to the buildbot.tac file). It allows you to start/stop the
+# master or slave by doing 'make start' or 'make stop'.
+
+# The 'reconfig' target will tell a buildmaster to reload its config file.
+
+# Note that a relative PYTHONPATH entry is relative to the current directory.
+
+# On the Mac, the buildbot is started via the launchd mechanism as a
+# LaunchAgent to give the slave a proper Mac UI environment for tests.  In
+# order for this to work, the plist must be present and loaded by launchd, and
+# the user must be logged in to the UI.  The plist is loaded by launchd at user
+# login (and the job may have been initially started at that time too).  Our
+# Mac build slaves are all set up this way, and have auto-login enabled, so
+# "make start" should just work and do the right thing.
+#
+# When using launchd to start the job, it also needs to be used to stop the
+# job.  Otherwise, launchd might try to restart the job when stopped manually
+# by SIGTERM.  Using SIGHUP for reconfig is safe with launchd.
+#
+# Because it's possible to have more than one slave on a machine (for testing),
+# this tests to make sure that the slave is in the known slave location,
+# /b/slave, which is what the LaunchAgent operates on.
+USE_LAUNCHD := \
+  $(shell [ -f ~/Library/LaunchAgents/org.chromium.buildbot.master.client.webm.plist ] && \
+          [ "$$(pwd -P)" = "/b/build/masters/master.client.webm" ] && \
+          echo 1)
+
+start:
+ifneq ($(USE_LAUNCHD),1)
+        PYTHONPATH=../../third_party/buildbot_7_12:../../third_party/twisted_8_1:../../scripts:../../third_party:../../site_config:../../../build_internal/site_config:. python ../../scripts/common/twistd --no_save -y buildbot.tac
+else
+        launchctl start org.chromium.buildbot.master.client.webm
+endif
+
+stop:
+ifneq ($(USE_LAUNCHD),1)
+        if `test -f twistd.pid`; then kill `cat twistd.pid`; fi;
+else
+        launchctl stop org.chromium.buildbot.master.client.webm
+endif
+
+reconfig:
+        kill -HUP `cat twistd.pid`
+
+log:
+        tail -F twistd.log
+
+wait:
+        while `test -f twistd.pid`; do sleep 1; done;
+
+restart: stop wait start log