Add sheriff details to roll commit message.

tools/release/chromium_roll.py

Index: tools/release/chromium_roll.py
diff --git a/tools/release/chromium_roll.py b/tools/release/chromium_roll.py
index 8a3ff4a0a7c8695dc1ff43a50cbb13a27669780d..42035a8135582cb185fdcaf67f4d4911306f78d9 100755
--- a/tools/release/chromium_roll.py
+++ b/tools/release/chromium_roll.py
@@ -14,6 +14,18 @@ ROLL_SUMMARY = ("Summary of changes available at:\n"
                 "https://chromium.googlesource.com/v8/v8/+log/%s..%s")
 
 
+SPECIALTY_SHERIFF_MSG = (
+"""Please assign any issues to the V8 specialty sheriffs of one of the
+following categories:
+
+Stability: jkummerow@chromium.org
+Performance: bmeurer@chromium.org, mvstanton@chromium.org
+Clusterfuzz: jarin@chromium.org, mstarzinger@chromium.org
+
+Please CC hablich@chromium.org on all issues.""")
+
+GENERALIST_SHERIFF_MSG = "Assign remaining issues to the V8 sheriff %s"
+
 class Preparation(Step):
   MESSAGE = "Preparation."
 
@@ -93,9 +105,11 @@ class UploadCL(Step):
     message.append(
         ROLL_SUMMARY % (self["last_rolled_base"][:8], self["push_base"][:8]))
 
+    message.append(SPECIALTY_SHERIFF_MSG)
+
     if self["sheriff"]:
-      message.append("Please reply to the V8 sheriff %s in case of problems."
-          % self["sheriff"])
+      message.append(GENERALIST_SHERIFF_MSG % self["sheriff"])
+
     message.append("TBR=%s" % self._options.reviewer)
     self.GitCommit("\n\n".join(message),
                    author=self._options.author,