Switch to using the boardless pfq master

The boardless master will be running MasterUploadPrebuiltsStage,
instead of the board-specific UploadPrebuiltsStage.

This CL needs to coincide with the corresponding waterfall change and
land during a scheduled down time.

BUG=chromium:363659
TEST=`cbuildbot --remote --buildbot --debug master-chromium-pfq`

Change-Id: Icd6ebc7c3f138ec805fe540af1d32898950ffc21
Reviewed-on: https://chromium-review.googlesource.com/210036
Tested-by: Yu-Ju Hong <yjhong@chromium.org>
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
diff --git a/scripts/cbuildbot.py b/scripts/cbuildbot.py
index 1d9e9a8..8d44659 100644
--- a/scripts/cbuildbot.py
+++ b/scripts/cbuildbot.py
@@ -601,11 +601,11 @@
     self._RunSetupBoard()
     self._RunStage(report_stages.RefreshPackageStatusStage)
 
-  def _RunMasterPaladinBuild(self):
-    """Runs through the stages of the paladin (commit queue) master build."""
+  def _RunMasterPaladinOrChromePFQBuild(self):
+    """Runs through the stages of the paladin or chrome PFQ master build."""
     self._RunStage(build_stages.InitSDKStage)
     self._RunStage(build_stages.UprevStage)
-    # The CQ (paladin) master will not actually run the SyncChrome stage, but
+    # The CQ/Chrome PFQ master will not actually run the SyncChrome stage, but
     # we want the logic that gets triggered when SyncChrome stage is skipped.
     self._RunStage(chrome_stages.SyncChromeStage)
     self._RunStage(artifact_stages.MasterUploadPrebuiltsStage)
@@ -693,9 +693,10 @@
       self._RunChrootBuilderTypeBuild()
     elif self._run.config.build_type == constants.REFRESH_PACKAGES_TYPE:
       self._RunRefreshPackagesTypeBuild()
-    elif (self._run.config.build_type == constants.PALADIN_TYPE and
+    elif ((self._run.config.build_type == constants.PALADIN_TYPE or
+           self._run.config.build_type == constants.CHROME_PFQ_TYPE) and
           self._run.config.master):
-      self._RunMasterPaladinBuild()
+      self._RunMasterPaladinOrChromePFQBuild()
     elif self._run.config.build_type == constants.PAYLOADS_TYPE:
       self._RunPayloadsBuild()
     else: