Use a direct include of strings headers in testing/, third_party/, tools/.

tools/memory_watcher/call_stack.cc

 // Copyright (c) 2010 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 "tools/memory_watcher/call_stack.h"
 
 #include <shlwapi.h>
 #include <tlhelp32.h>
 
-#include "base/string_number_conversions.h"
+#include "base/strings/string_number_conversions.h"
 #include "tools/memory_watcher/memory_hook.h"
 
 // Typedefs for explicit dynamic linking with functions exported from
 // dbghelp.dll.
 typedef BOOL (__stdcall *t_StackWalk64)(DWORD, HANDLE, HANDLE,
                                         LPSTACKFRAME64, PVOID,
                                         PREAD_PROCESS_MEMORY_ROUTINE64,
                                         PFUNCTION_TABLE_ACCESS_ROUTINE64,
                                         PGET_MODULE_BASE_ROUTINE64,
                                         PTRANSLATE_ADDRESS_ROUTINE64);
@@ skipping 369 matching lines @@
   return MemoryHook::Alloc(size);
 }
 
 void AllocationStack::operator delete(void* ptr) {
   AllocationStack *stack = reinterpret_cast<AllocationStack*>(ptr);
   base::AutoLock lock(freelist_lock_);
   DCHECK(stack->next_ == NULL);
   stack->next_ = freelist_;
   freelist_ = stack;
 }