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diff --git a/Tools/Scripts/webkitpy/tool/commands/roll.py b/Tools/Scripts/webkitpy/tool/commands/roll.py
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+++ b/Tools/Scripts/webkitpy/tool/commands/roll.py
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+# Copyright (c) 2011 Google Inc. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+from webkitpy.tool.commands.abstractsequencedcommand import AbstractSequencedCommand
+
+from webkitpy.tool import steps
+
+
+class RollChromiumDEPS(AbstractSequencedCommand):
+    name = "roll-chromium-deps"
+    help_text = "Updates Chromium DEPS (defaults to the last-known good revision of Chromium)"
+    argument_names = "[CHROMIUM_REVISION]"
+    steps = [
+        steps.UpdateChromiumDEPS,
+        steps.PrepareChangeLogForDEPSRoll,
+        steps.ConfirmDiff,
+        steps.Commit,
+    ]
+
+    def _prepare_state(self, options, args, tool):
+        return {
+            "chromium_revision": (args and args[0]),
+        }
+
+
+class PostChromiumDEPSRoll(AbstractSequencedCommand):
+    name = "post-chromium-deps-roll"
+    help_text = "Posts a patch to update Chromium DEPS (revision defaults to the last-known good revision of Chromium)"
+    argument_names = "CHROMIUM_REVISION CHROMIUM_REVISION_NAME"
+    steps = [
+        steps.CleanWorkingDirectory,
+        steps.Update,
+        steps.UpdateChromiumDEPS,
+        steps.PrepareChangeLogForDEPSRoll,
+        steps.CreateBug,
+        steps.PostDiff,
+    ]
+
+    def _prepare_state(self, options, args, tool):
+        options.review = False
+        options.request_commit = True
+
+        chromium_revision = args[0]
+        chromium_revision_name = args[1]
+        return {
+            "chromium_revision": chromium_revision,
+            "bug_title": "Roll Chromium DEPS to %s" % chromium_revision_name,
+            "bug_description": "A DEPS roll a day keeps the build break away.",
+        }