Remove BLINK_ASSERT() and BLINK_ASSERT_NOT_REACHED() macros.

third_party/WebKit/public/platform/WebMemoryAllocatorDump.h

 // Copyright 2015 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.
 
 #ifndef WebMemoryAllocatorDump_h
 #define WebMemoryAllocatorDump_h
 
 #include "WebCommon.h"
 #include "WebString.h"
 
@@ skipping 17 matching lines @@
     virtual void addScalar(const char* name, const char* units, uint64_t value) {}
     virtual void addScalarF(const char* name, const char* units, double value) {}
     virtual void addString(const char* name, const char* units, const WebString& value) {}
 
     // |guid| is an optional global dump identifier, unique across all processes
     // within the scope of a global dump. It is only required when using the
     // graph APIs (see AddOwnershipEdge) to express retention / suballocation or
     // cross process sharing. See crbug.com/492102 for design docs.
     // Subsequent MemoryAllocatorDump(s) with the same |absolute_name| are
     // expected to have the same guid.
-    virtual WebMemoryAllocatorDumpGuid guid() const
-    {
-        BLINK_ASSERT_NOT_REACHED();
-        return 0;
-    }
+    virtual WebMemoryAllocatorDumpGuid guid() const = 0;
 };
 
 } // namespace blink
 
 #endif // WebMemoryAllocatorDump_h