Remove dependency from NaCl code on chrome_constants.

chrome/browser/nacl_host/nacl_browser.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_NACL_HOST_NACL_BROWSER_H_
 #define CHROME_BROWSER_NACL_HOST_NACL_BROWSER_H_
 
 #include "base/bind.h"
 #include "base/containers/mru_cache.h"
 #include "base/files/file_util_proxy.h"
@@ skipping 91 matching lines @@
   // TODO(ncbray): move the cache onto NaClProcessHost so that we don't need to
   // rely on tokens being unguessable by another process.
   void PutFilePath(const base::FilePath& path, uint64* file_token_lo,
                    uint64* file_token_hi);
   bool GetFilePath(uint64 file_token_lo, uint64 file_token_hi,
                    base::FilePath* path);
 
   bool QueryKnownToValidate(const std::string& signature, bool off_the_record);
   void SetKnownToValidate(const std::string& signature, bool off_the_record);
   void ClearValidationCache(const base::Closure& callback);
+#if defined(OS_WIN)
+  // Get path to NaCl loader on the filesystem if possible.
+  // |exe_path| does not change if the method fails.
+  bool GetNaCl64ExePath(base::FilePath* exe_path);
+#endif
 
  private:
   friend struct DefaultSingletonTraits<NaClBrowser>;
 
   enum NaClResourceState {
     NaClResourceUninitialized,
     NaClResourceRequested,
     NaClResourceReady
   };
 
@@ skipping 42 matching lines @@
 
   bool ok_;
 
   // A list of pending tasks to start NaCl processes.
   std::vector<base::Closure> waiting_;
 
   DISALLOW_COPY_AND_ASSIGN(NaClBrowser);
 };
 
 #endif  // CHROME_BROWSER_NACL_HOST_NACL_BROWSER_H_