1 files changed, 57 insertions, 0 deletions
diff --git a/chromium/third_party/WebKit/Source/core/frame/PRESUBMIT.py b/chromium/third_party/WebKit/Source/core/frame/PRESUBMIT.py
new file mode 100644
index 00000000000..eba4c2f6642
--- /dev/null
+++ b/chromium/third_party/WebKit/Source/core/frame/PRESUBMIT.py
@@ -0,0 +1,57 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Blink frame presubmit script
+
+See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
+for more details about the presubmit API built into gcl.
+"""
+
+
+def _RunUseCounterChecks(input_api, output_api):
+    for f in input_api.AffectedFiles():
+        if f.LocalPath().endswith('UseCounter.cpp'):
+            useCounterCpp = f
+            break
+    else:
+        return []
+
+    largestFoundBucket = 0
+    maximumBucket = 0
+    # Looking for a line like "case CSSPropertyGrid: return 453;"
+    bucketFinder = input_api.re.compile(r'.*CSSProperty.*return\s*([0-9]+).*')
+    # Looking for a line like "static int maximumCSSSampleId() { return 452; }"
+    maximumFinder = input_api.re.compile(
+        r'static int maximumCSSSampleId\(\) { return ([0-9]+)')
+    for line in useCounterCpp.NewContents():
+        bucketMatch = bucketFinder.match(line)
+        if bucketMatch:
+            bucket = int(bucketMatch.group(1))
+            largestFoundBucket = max(largestFoundBucket, bucket)
+        else:
+            maximumMatch = maximumFinder.match(line)
+            if maximumMatch:
+                maximumBucket = int(maximumMatch.group(1))
+
+    if largestFoundBucket != maximumBucket:
+        if input_api.is_committing:
+            message_type = output_api.PresubmitError
+        else:
+            message_type = output_api.PresubmitPromptWarning
+
+        return [message_type(
+            'Largest found CSSProperty bucket Id (%d) does not match '
+            'maximumCSSSampleId (%d)' %
+                    (largestFoundBucket, maximumBucket),
+            items=[useCounterCpp.LocalPath()])]
+
+    return []
+
+
+def CheckChangeOnUpload(input_api, output_api):
+    return _RunUseCounterChecks(input_api, output_api)
+
+
+def CheckChangeOnCommit(input_api, output_api):
+    return _RunUseCounterChecks(input_api, output_api)