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diff --git a/chromium/third_party/WebKit/Source/platform/DragImageTest.cpp b/chromium/third_party/WebKit/Source/platform/DragImageTest.cpp
new file mode 100644
index 00000000000..6be32460c8a
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+++ b/chromium/third_party/WebKit/Source/platform/DragImageTest.cpp
@@ -0,0 +1,168 @@
+/*
+ * Copyright (C) 2010 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/DragImage.h"
+
+#include "platform/fonts/FontDescription.h"
+#include "platform/fonts/FontTraits.h"
+#include "platform/geometry/IntSize.h"
+#include "platform/graphics/Image.h"
+#include "platform/graphics/skia/NativeImageSkia.h"
+#include "platform/weborigin/KURL.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "wtf/OwnPtr.h"
+#include "wtf/PassOwnPtr.h"
+#include "wtf/PassRefPtr.h"
+#include "wtf/RefPtr.h"
+
+#include <gtest/gtest.h>
+
+using namespace WebCore;
+
+namespace {
+
+class TestImage : public Image {
+public:
+
+    static PassRefPtr<TestImage> create(const IntSize& size)
+    {
+        return adoptRef(new TestImage(size));
+    }
+
+    explicit TestImage(const IntSize& size)
+        : Image(0)
+        , m_size(size)
+    {
+        SkBitmap bitmap;
+        EXPECT_TRUE(bitmap.allocN32Pixels(size.width(), size.height()));
+        m_nativeImage = NativeImageSkia::create(bitmap);
+    }
+
+    virtual IntSize size() const OVERRIDE
+    {
+        return m_size;
+    }
+
+    virtual PassRefPtr<NativeImageSkia> nativeImageForCurrentFrame() OVERRIDE
+    {
+        if (m_size.isZero())
+            return nullptr;
+
+        return m_nativeImage;
+    }
+
+    // Stub implementations of pure virtual Image functions.
+    virtual void destroyDecodedData(bool) OVERRIDE
+    {
+    }
+
+    virtual bool currentFrameKnownToBeOpaque() OVERRIDE
+    {
+        return false;
+    }
+
+    virtual void draw(GraphicsContext*, const FloatRect&, const FloatRect&, CompositeOperator, blink::WebBlendMode) OVERRIDE
+    {
+    }
+
+private:
+
+    IntSize m_size;
+
+    RefPtr<NativeImageSkia> m_nativeImage;
+};
+
+TEST(DragImageTest, NullHandling)
+{
+    EXPECT_FALSE(DragImage::create(0));
+
+    RefPtr<TestImage> nullTestImage(TestImage::create(IntSize()));
+    EXPECT_FALSE(DragImage::create(nullTestImage.get()));
+}
+
+TEST(DragImageTest, NonNullHandling)
+{
+    RefPtr<TestImage> testImage(TestImage::create(IntSize(2, 2)));
+    OwnPtr<DragImage> dragImage = DragImage::create(testImage.get());
+    ASSERT_TRUE(dragImage);
+
+    dragImage->scale(0.5, 0.5);
+    IntSize size = dragImage->size();
+    EXPECT_EQ(1, size.width());
+    EXPECT_EQ(1, size.height());
+
+    dragImage->dissolveToFraction(0.5);
+}
+
+TEST(DragImageTest, CreateDragImage)
+{
+    {
+        // Tests that the DrageImage implementation doesn't choke on null values
+        // of nativeImageForCurrentFrame().
+        RefPtr<TestImage> testImage(TestImage::create(IntSize()));
+        EXPECT_FALSE(DragImage::create(testImage.get()));
+    }
+
+    {
+        // Tests that the drag image is a deep copy.
+        RefPtr<TestImage> testImage(TestImage::create(IntSize(1, 1)));
+        OwnPtr<DragImage> dragImage = DragImage::create(testImage.get());
+        ASSERT_TRUE(dragImage);
+        SkAutoLockPixels lock1(dragImage->bitmap()), lock2(testImage->nativeImageForCurrentFrame()->bitmap());
+        EXPECT_NE(dragImage->bitmap().getPixels(), testImage->nativeImageForCurrentFrame()->bitmap().getPixels());
+    }
+}
+
+TEST(DragImageTest, TrimWhitespace)
+{
+    KURL url(ParsedURLString, "http://www.example.com/");
+    String testLabel = "          Example Example Example      \n    ";
+    String expectedLabel = "Example Example Example";
+    float deviceScaleFactor = 1.0f;
+
+    FontDescription fontDescription;
+    fontDescription.firstFamily().setFamily("Arial");
+    fontDescription.setSpecifiedSize(16);
+    fontDescription.setIsAbsoluteSize(true);
+    fontDescription.setGenericFamily(FontDescription::NoFamily);
+    fontDescription.setWeight(FontWeightNormal);
+    fontDescription.setStyle(FontStyleNormal);
+
+    OwnPtr<DragImage> testImage =
+        DragImage::create(url, testLabel, fontDescription, deviceScaleFactor);
+    OwnPtr<DragImage> expectedImage =
+        DragImage::create(url, expectedLabel, fontDescription, deviceScaleFactor);
+
+    EXPECT_EQ(testImage->size().width(), expectedImage->size().width());
+}
+
+} // anonymous namespace