Annotate ScriptWrappable-embedding singletons.

third_party/WebKit/Source/wtf/Allocator.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 WTF_Allocator_h
 #define WTF_Allocator_h
 
 #include "wtf/Assertions.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/allocator/Partitions.h"
@@ skipping 64 matching lines @@
   __attribute__((annotate("blink_stack_allocated"))) void* operator new( \
       size_t) = delete;                                                  \
   void* operator new(size_t, NotNullTag, void*) = delete;                \
   void* operator new(size_t, void*) = delete;                            \
                                                                          \
  public:
 #else
 #define STACK_ALLOCATED() DISALLOW_NEW()
 #endif
 
+#if COMPILER(CLANG)
+#define STATIC_ALLOCATED_SINGLETON() \
+  __attribute__((annotate("blink_gc_singleton_type")))
+#else
+#define STATIC_ALLOCATED_SINGLETON()
+#endif
+
 // Provides customizable overrides of fastMalloc/fastFree and operator
 // new/delete
 //
 // Provided functionality:
 //    Macro: USING_FAST_MALLOC
 //
 // Example usage:
 //    class Widget {
 //        USING_FAST_MALLOC(Widget)
 //    ...
@@ skipping 45 matching lines @@
 // Furthermore, the |WITH_TYPE_NAME| variant does not work if |type| is a
 // template argument; |USING_FAST_MALLOC| does.
 #define USING_FAST_MALLOC(type) \
   USING_FAST_MALLOC_INTERNAL(type, WTF_HEAP_PROFILER_TYPE_NAME(type))
 #define USING_FAST_MALLOC_WITH_TYPE_NAME(type) \
   USING_FAST_MALLOC_INTERNAL(type, #type)
 
 }  // namespace WTF
 
 #endif /* WTF_Allocator_h */