Make --enable-heap-profiling=native "work" on Windows.

build/config/compiler/BUILD.gn

 # Copyright (c) 2013 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.
 
 import("//build/config/android/config.gni")
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/nacl/config.gni")
 import("//build/toolchain/cc_wrapper.gni")
 import("//build/toolchain/toolchain.gni")
@@ skipping 1378 matching lines @@
     if (using_sanitizer || enable_profiling || is_debug ||
         current_cpu == "arm64") {
       # Explicitly ask for frame pointers, otherwise:
       # * Stacks may be missing for sanitizer and profiling builds.
       # * Debug tcmalloc can crash (crbug.com/636489).
       # * Stacks may be missing for arm64 crash dumps (crbug.com/391706).
       cflags = [ "-fno-omit-frame-pointer" ]
     } else if (is_android) {
       cflags = [ "-fomit-frame-pointer" ]
     }
+  } else if (is_win && enable_profiling) {
+    # common_optimize_on_cflags actually includes /Oy- to enable generation
+    # of frame pointers, but add it here explicitly in case that changes.
+    cflags = [ "/Oy-" ]
   }
 }
 
 # Default "optimization on" config.
 config("optimize") {
   if (is_win) {
     # TODO(thakis): Remove is_clang here, https://crbug.com/598772
     if (is_official_build && full_wpo_on_official && !is_clang) {
       common_optimize_on_cflags += [
         "/GL",  # Whole program optimization.
@@ skipping 294 matching lines @@
 
 if (is_ios || is_mac) {
   # On Mac and iOS, this enables support for ARC (automatic ref-counting).
   # See http://clang.llvm.org/docs/AutomaticReferenceCounting.html.
   config("enable_arc") {
     common_flags = [ "-fobjc-arc" ]
     cflags_objc = common_flags
     cflags_objcc = common_flags
   }
 }