Remove DumpWithoutCrashing from ShouldAllowOpenURL.

tools/metrics/histograms/presubmit_scheme_histograms.py

Index: tools/metrics/histograms/presubmit_scheme_histograms.py
diff --git a/tools/metrics/histograms/presubmit_scheme_histograms.py b/tools/metrics/histograms/presubmit_scheme_histograms.py
new file mode 100644
index 0000000000000000000000000000000000000000..4adccb98def363041970ae7740597614f880d256
--- /dev/null
+++ b/tools/metrics/histograms/presubmit_scheme_histograms.py
@@ -0,0 +1,31 @@
+# Copyright 2017 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.
+
+"""Check to see if the ShouldAllowOpenURLFailureScheme enum in histograms.xml
+needs to be updated. This can be called from a chromium PRESUBMIT.py to ensure
+updates to the enum in chrome_content_browser_client_extensions_part.cc also
+include the generated changes to histograms.xml.
+"""
+
+import update_histogram_enum
+
+def PrecheckShouldAllowOpenURLEnums(input_api, output_api):
+  source_file = 'chrome/browser/extensions/' \
+                'chrome_content_browser_client_extensions_part.cc'
+
+  affected_files = (f.LocalPath() for f in input_api.AffectedFiles())
+  if source_file not in affected_files:
+    return []
+
+  if update_histogram_enum.HistogramNeedsUpdate(
+      histogram_enum_name='ShouldAllowOpenURLFailureScheme',
+      source_enum_path=source_file,
+      start_marker='^enum ShouldAllowOpenURLFailureScheme {',
+      end_marker='^SCHEME_LAST'):
+    return [output_api.PresubmitPromptWarning(
+        'ShouldAllowOpenURLFailureScheme has been updated but histogram.xml '
+        'does not appear to be updated.\nPlease run:\n'
+        '  python tools/metrics/histograms/'
+        'update_should_allow_open_url_histograms.py\n')]
+  return []