Revert of Allocator shims working on VS2015.

base/allocator/allocator_check.cc

Index: base/allocator/allocator_check.cc
diff --git a/base/allocator/allocator_check.cc b/base/allocator/allocator_check.cc
index 5a0564d2f3efd895c9e77e16ec903c7e5295e48d..cb5a987a1271274366fcf5a92a30310420200da5 100644
--- a/base/allocator/allocator_check.cc
+++ b/base/allocator/allocator_check.cc
@@ -6,10 +6,6 @@
 
 #include "build/build_config.h"
 
-#if defined(OS_WIN)
-#include "base/allocator/allocator_shim_win.h"
-#endif
-
 #if defined(OS_LINUX)
 #include <malloc.h>
 #endif
@@ -17,9 +13,15 @@
 namespace base {
 namespace allocator {
 
+// Defined in allocator_shim_win.cc .
+// TODO(primiano): replace with an include once base can depend on allocator.
+#if defined(OS_WIN) && defined(ALLOCATOR_SHIM)
+extern bool g_is_win_shim_layer_initialized;
+#endif
+
 bool IsAllocatorInitialized() {
 #if defined(OS_WIN) && defined(ALLOCATOR_SHIM)
-  // Set by allocator_shim_win.cc when the shimmed _set_new_mode() is called.
+  // Set by allocator_shim_win.cc when the shimmed _heap_init() is called.
   return g_is_win_shim_layer_initialized;
 #elif defined(OS_LINUX) && defined(USE_TCMALLOC) && \
     !defined(MEMORY_TOOL_REPLACES_ALLOCATOR)