Move exportable_commits_since to webkitpy/w3c/common.py.

third_party/WebKit/Tools/Scripts/webkitpy/w3c/chromium_commit.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/w3c/chromium_commit.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/w3c/chromium_commit.py b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/chromium_commit.py
index 1952e616b95d58b8ee4ca85adf9fb2a9d80c5dee..76e48ec83bd7a21ae46024d2ffe474c07c1d8d9a 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/w3c/chromium_commit.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/chromium_commit.py
@@ -4,7 +4,6 @@
 
 from webkitpy.common.memoized import memoized
 from webkitpy.common.webkit_finder import WebKitFinder
-from webkitpy.w3c.deps_updater import DepsUpdater
 
 CHROMIUM_WPT_DIR = 'third_party/WebKit/LayoutTests/external/wpt/'
 
@@ -81,7 +80,13 @@ class ChromiumCommit(object):
             self.host.filesystem.join('resources', 'testharnessreport.js'),
         ]
         qualified_blacklist = [CHROMIUM_WPT_DIR + f for f in blacklist]
-        return [f for f in changed_files if f not in qualified_blacklist and not DepsUpdater.is_baseline(f)]
+
+        return [f for f in changed_files if f not in qualified_blacklist and not self.is_baseline(f)]
+
+    @staticmethod
+    def is_baseline(basename):
+        # TODO(qyearsley): Find a better, centralized place for this.
+        return basename.endswith('-expected.txt')
 
     def format_patch(self):
         """Makes a patch with only exportable changes."""