Update EscapeExternalHandlerValue to keep '#', '[', and ']'

chrome/browser/android/url_sanitize_utils_unittest.cc

+// 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.
+
+#include "chrome/browser/android/url_sanitize_utils.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chrome {
+namespace android {
+
+class UrlSanitizeUtilsTest : public testing::Test {};
+
+TEST_F(UrlSanitizeUtilsTest, SanitizeUrl) {
+  EXPECT_EQ("http://example.com/path%5B%5D/sub?q=a%7Cb%7Cc&q=1%7C2%7C3#ref%7C",
+            SanitizeUrl(GURL("http://example.com/path[]/"
+                             "sub?q=a|b|c&q=1|2|3#ref|")).spec());
+
+  EXPECT_EQ("http://example.com/path%5B%5D/sub?q=a%7Cb%7Cc&q=1%7C2%7C3#ref%7C",
+            SanitizeUrl(GURL("http://example.com/path%5B%5D/"
+                             "sub?q=a%7Cb%7Cc&q=1%7C2%7C3#ref%7C")).spec());
+
+  EXPECT_EQ("http://example.com/",
+            SanitizeUrl(GURL("http://example.com/")).spec());
+}
+
+}  // namespace android
+}  // namespace chrome