Do not record startup metrics when non-browser UI was displayed

chrome/browser/ui/simple_message_box_internal.h

Index: chrome/browser/ui/simple_message_box_internal.h
diff --git a/chrome/browser/ui/simple_message_box_internal.h b/chrome/browser/ui/simple_message_box_internal.h
new file mode 100644
index 0000000000000000000000000000000000000000..642609ab09118fcc6fa4ee49c2de8e9006940b85
--- /dev/null
+++ b/chrome/browser/ui/simple_message_box_internal.h
@@ -0,0 +1,14 @@
+// Copyright (c) 2015 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.
+
+#ifndef CHROME_BROWSER_UI_SIMPLE_MESSAGE_BOX_INTERNAL_H_
+#define CHROME_BROWSER_UI_SIMPLE_MESSAGE_BOX_INTERNAL_H_
+
+namespace chrome {
+namespace internal {
+extern bool g_should_skip_message_box_for_test;

[gab, 2015/06/09 15:52:28]

Add a comment describing this variable, e.g.:

// If true: skips prompting a blocking message box in tests in situations where
// such UI would freeze the test, but behaves as though such a box had come up
// and the user had clicked "OK". Defaults to false.

+}

[gab, 2015/06/09 15:52:28]

}  // namespace internal

(2 space + comment with namespace name for every bracket closing a namespace --
here and in .cc file)

+}
+
+#endif  // CHROME_BROWSER_UI_SIMPLE_MESSAGE_BOX_INTERNAL_H_