Start refactoring Windows allocator shim in prep for hooking in generic allocator shim on Windows.

base/allocator/winheap_stubs_win.h

Index: base/allocator/winheap_stubs_win.h
diff --git a/base/allocator/winheap_stubs_win.h b/base/allocator/winheap_stubs_win.h
new file mode 100644
index 0000000000000000000000000000000000000000..103170a1690e6fd270c9b7601db140d9050bf595
--- /dev/null
+++ b/base/allocator/winheap_stubs_win.h
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.

[Primiano Tucci (use gerrit), 2016/07/13 17:42:49]

nit: drop your wayback machine :P (also the new copyright header doesn't have
the (c)

[Sigurður Ásgeirsson, 2016/07/13 18:47:45]

Copy-paste FTW.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Thin allocation wrappers for the windows heap. This file should be deleted
+// once the win-specific allocation shim has been removed, and the generic shim
+// has becaome the default.
+
+#ifndef BASE_ALLOCATOR_ALLOCATOR_WINHEAP_STUBS_H_

[Primiano Tucci (use gerrit), 2016/07/13 17:42:49]

nit: s/ALLOCATOR_ALLOCATOR_/ALLOCATOR_/

[Sigurður Ásgeirsson, 2016/07/13 18:47:45]

and again :/

+#define BASE_ALLOCATOR_ALLOCATOR_WINHEAP_STUBS_H_
+
+#include <windows.h>

[Primiano Tucci (use gerrit), 2016/07/13 17:42:49]

not sure you need this windows.h here. Looks like you really need stdint.h

[Sigurður Ásgeirsson, 2016/07/13 18:47:45]

Done.

+
+namespace base {
+namespace allocator {
+
+// Set to true if the link-time magic has successfully hooked into the CRT's
+// heap initialization.
+extern bool g_is_win_shim_layer_initialized;
+
+// Thin wrappers to implement the standard C allocation semantics on the
+// CRT's Windows heap.
+void* WinHeapMalloc(size_t size);
+void WinHeapFree(void* size);
+void* WinHeapRealloc(void* ptr, size_t size);
+void* WinHeapCalloc(size_t n, size_t elem_size);
+
+// Call the new handler, if one has been set.
+// Returns true on successfully calling the handler, false otherwise.
+bool WinCallNewHandler(size_t size);
+
+}  // namespace allocator
+}  // namespace base
+
+#endif  // BASE_ALLOCATOR_ALLOCATOR_WINHEAP_STUBS_H_