Fix use-of-uninitialized-value in TransformationMatrix::blend()

Source/platform/transforms/TransformationMatrixTest.cpp

+// 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 "config.h"
+#include "platform/transforms/TransformationMatrix.h"
+
+#include <gtest/gtest.h>
+
+using namespace WebCore;
+namespace {
+
+TEST(TransformationMatrixTest, NonInvertableBlendTest)
+{
+    TransformationMatrix from;
+    TransformationMatrix to(2.7133590938, 0.0, 0.0, 0.0, 0.0, 2.4645137761, 0.0, 0.0, 0.0, 0.0, 0.00, 0.01, 0.02, 0.03, 0.04, 0.05);
+    TransformationMatrix result;
+
+    result = to;
+    result.blend(from, 0.25);
+    EXPECT_TRUE(result == from);
+
+    result = to;
+    result.blend(from, 0.75);
+    EXPECT_TRUE(result == to);
+}
+
+} // namespace