Remove tcmalloc when not being used. Restore shim on Windows.

base/allocator/generic_allocators.cc

 // Copyright (c) 2009 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.
 
 // When possible, we implement allocator functions on top of the basic
 // low-level functions malloc() and free().  This way, including a new
 // allocator is as simple as providing just a small interface.
 //
 // As such, this file should not contain any allocator-specific code.
 
 // Implement a C++ style allocation, which always calls the new_handler
 // on failure.
 inline void* generic_cpp_alloc(size_t size, bool nothrow) {
   void* ptr;
   for (;;) {
     ptr = malloc(size);
     if (ptr)
       return ptr;
-    if (!call_new_handler(nothrow))
+    if (!call_new_handler(nothrow, size))
       break;
   }
   return ptr;
 }
 
 extern "C++" {
 
 void* operator new(size_t size) {
   return generic_cpp_alloc(size, false);
 }
@@ skipping 46 matching lines @@
   const size_t size = n * elem_size;
   if (elem_size != 0 && size / elem_size != n) return NULL;
 
   void* result = malloc(size);
   if (result != NULL) {
     memset(result, 0, size);
   }
   return result;
 }
 
-void cfree(void* p) __THROW {
+void cfree(void* p) {
   free(p);
 }
 
 #ifdef WIN32
 
 void* _recalloc(void* p, size_t n, size_t elem_size) {
   if (!p)
     return calloc(n, elem_size);
 
   // This API is a bit odd.
@@ skipping 70 matching lines @@
 
 void* _calloc_dbg(size_t n, size_t size, int, const char*, int) {
   return calloc(n, size);
 }
 #endif  // NDEBUG
 
 #endif  // WIN32
 
 }  // extern C