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diff --git a/chromium/third_party/WebKit/Source/platform/text/SegmentedStringTest.cpp b/chromium/third_party/WebKit/Source/platform/text/SegmentedStringTest.cpp
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+++ b/chromium/third_party/WebKit/Source/platform/text/SegmentedStringTest.cpp
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2014 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "platform/text/SegmentedString.h"
+
+#include <gtest/gtest.h>
+
+using WebCore::SegmentedString;
+
+namespace {
+
+TEST(SegmentedStringTest, CurrentChar)
+{
+    SegmentedString original(String("cde"));
+    {
+        SegmentedString copied(original);
+        SegmentedString assigned;
+        assigned = original;
+        EXPECT_EQ("cde", original.toString());
+        EXPECT_EQ('c', original.currentChar());
+        EXPECT_EQ('c', copied.currentChar());
+        EXPECT_EQ('c', assigned.currentChar());
+    }
+    original.push('a');
+    {
+        SegmentedString copied(original);
+        SegmentedString assigned;
+        assigned = original;
+        EXPECT_EQ("acde", original.toString());
+        EXPECT_EQ('a', original.currentChar());
+        EXPECT_EQ('a', copied.currentChar());
+        EXPECT_EQ('a', assigned.currentChar());
+    }
+    original.push('b');
+    {
+        // Two consecutive push means to push the second char *after* the
+        // first char in SegmentedString.
+        SegmentedString copied(original);
+        SegmentedString assigned;
+        assigned = original;
+        EXPECT_EQ("abcde", original.toString());
+        EXPECT_EQ('a', original.currentChar());
+        EXPECT_EQ('a', copied.currentChar());
+        EXPECT_EQ('a', assigned.currentChar());
+    }
+    original.advance();
+    {
+        SegmentedString copied(original);
+        SegmentedString assigned;
+        assigned = original;
+        EXPECT_EQ("bcde", original.toString());
+        EXPECT_EQ('b', original.currentChar());
+        EXPECT_EQ('b', copied.currentChar());
+        EXPECT_EQ('b', assigned.currentChar());
+    }
+}
+
+} // namespace