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diff --git a/chromium/third_party/WebKit/Source/platform/heap/AddressSanitizer.h b/chromium/third_party/WebKit/Source/platform/heap/AddressSanitizer.h
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+++ b/chromium/third_party/WebKit/Source/platform/heap/AddressSanitizer.h
@@ -0,0 +1,65 @@
+/*
+ * 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.
+ */
+
+#ifndef AddressSanitizer_h
+#define AddressSanitizer_h
+
+// FIXME: Add SyZyASan support?
+#if defined(ADDRESS_SANITIZER)
+#include <sanitizer/asan_interface.h>
+#else
+#define ASAN_POISON_MEMORY_REGION(addr, size)   \
+    ((void)(addr), (void)(size))
+#define ASAN_UNPOISON_MEMORY_REGION(addr, size) \
+    ((void)(addr), (void)(size))
+#endif
+
+#if defined(LEAK_SANITIZER)
+#include <sanitizer/lsan_interface.h>
+#else
+#define __lsan_register_root_region(addr, size) ((void)(addr), (void)(size))
+#define __lsan_unregister_root_region(addr, size) ((void)(addr), (void)(size))
+#endif
+
+// FIXME: Have to handle (ADDRESS_SANITIZER && _WIN32) differently as it uses
+// both Clang (which supports the __attribute__ syntax) and CL (which doesn't)
+// as long as we use "clang-cl /fallback". This shouldn't be needed when Clang
+// handles all the code without falling back to CL.
+#if defined(ADDRESS_SANITIZER) && (!OS(WIN) || COMPILER(CLANG))
+#define NO_SANITIZE_ADDRESS __attribute__((no_sanitize_address))
+#else
+#define NO_SANITIZE_ADDRESS
+#endif
+
+const size_t asanMagic = 0xabefeed0;
+const size_t asanDeferMemoryReuseCount = 2;
+const size_t asanDeferMemoryReuseMask = 0x3;
+
+#endif