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diff --git a/Source/WebKit/chromium/tests/FloatQuadTest.cpp b/Source/WebKit/chromium/tests/FloatQuadTest.cpp
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+++ b/Source/WebKit/chromium/tests/FloatQuadTest.cpp
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+/*
+ * Copyright (C) 2011 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:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS 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 APPLE OR ITS 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 "FloatQuad.h"
+
+#include "TransformationMatrix.h"
+
+#include <gtest/gtest.h>
+
+using namespace WebCore;
+
+namespace {
+
+TEST(FloatQuadTest, IsRectilinearTest)
+{
+    const int numRectilinear = 8;
+    TransformationMatrix rectilinearTrans[numRectilinear];
+    rectilinearTrans[1].rotate(90);
+    rectilinearTrans[2].rotate(180);
+    rectilinearTrans[3].rotate(270);
+    rectilinearTrans[4].skewX(0.00000000001);
+    rectilinearTrans[5].skewY(0.00000000001);
+    rectilinearTrans[6].scale(0.00001);
+    rectilinearTrans[6].rotate(180);
+    rectilinearTrans[7].scale(100000);
+    rectilinearTrans[7].rotate(180);
+
+    for (int i = 0; i < numRectilinear; ++i) {
+        FloatQuad quad = rectilinearTrans[i].mapQuad(FloatRect(0.01010101, 0.01010101, 100.01010101, 100.01010101));
+        EXPECT_TRUE(quad.isRectilinear());
+    }
+
+    const int numNonRectilinear = 10;
+    TransformationMatrix nonRectilinearTrans[numNonRectilinear];
+    nonRectilinearTrans[0].rotate(359.999);
+    nonRectilinearTrans[1].rotate(0.0000001);
+    nonRectilinearTrans[2].rotate(89.999999);
+    nonRectilinearTrans[3].rotate(90.0000001);
+    nonRectilinearTrans[4].rotate(179.999999);
+    nonRectilinearTrans[5].rotate(180.0000001);
+    nonRectilinearTrans[6].rotate(269.999999);
+    nonRectilinearTrans[7].rotate(270.0000001);
+    nonRectilinearTrans[8].skewX(0.00001);
+    nonRectilinearTrans[9].skewY(0.00001);
+
+    for (int i = 0; i < numNonRectilinear; ++i) {
+        FloatQuad quad = nonRectilinearTrans[i].mapQuad(FloatRect(0.01010101, 0.01010101, 100.01010101, 100.01010101));
+        EXPECT_FALSE(quad.isRectilinear());
+    }
+}
+
+} // empty namespace