Implement a ScopedThreadHeapUsage class to allow profiling per-thread heap usage.

base/allocator/allocator_shim_default_dispatch_to_linker_wrapped_symbols.cc

 // Copyright 2016 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.
 
 #include "base/allocator/allocator_shim.h"
 
 // This translation unit defines a default dispatch for the allocator shim which
 // routes allocations to the original libc functions when using the link-time
 // -Wl,-wrap,malloc approach (see README.md).
 // The __real_X functions here are special symbols that the linker will relocate
@@ skipping 27 matching lines @@
 }
 
 void* RealMemalign(const AllocatorDispatch*, size_t alignment, size_t size) {
   return __real_memalign(alignment, size);
 }
 
 void RealFree(const AllocatorDispatch*, void* address) {
   __real_free(address);
 }
 
+size_t RealSizeEstimate(const AllocatorDispatch*, void*) {
+  // TODO(primiano): This should be redirected to malloc_usable_size or
+  //     the like.
+  return 0;
+}
+
 }  // namespace
 
 const AllocatorDispatch AllocatorDispatch::default_dispatch = {
-    &RealMalloc,   /* alloc_function */
-    &RealCalloc,   /* alloc_zero_initialized_function */
-    &RealMemalign, /* alloc_aligned_function */
-    &RealRealloc,  /* realloc_function */
-    &RealFree,     /* free_function */
-    nullptr,       /* next */
+    &RealMalloc,       /* alloc_function */
+    &RealCalloc,       /* alloc_zero_initialized_function */
+    &RealMemalign,     /* alloc_aligned_function */
+    &RealRealloc,      /* realloc_function */
+    &RealFree,         /* free_function */
+    &RealSizeEstimate, /* get_size_estimate_function */
+    nullptr,           /* next */
 };