Disable "using base::FilePath" on Linux since it now compiles.

base/base_paths_mac.mm

 // 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.
 
 // Defines base::PathProviderMac which replaces base::PathProviderPosix for Mac
 // in base/path_service.cc.
 
 #include <dlfcn.h>
 #import <Foundation/Foundation.h>
 #include <mach-o/dyld.h>
 
 #include "base/base_paths.h"
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
 #include "build/build_config.h"
 
 namespace {
 
-void GetNSExecutablePath(FilePath* path) {
+void GetNSExecutablePath(base::FilePath* path) {
   DCHECK(path);
   // Executable path can have relative references ("..") depending on
   // how the app was launched.
   uint32_t executable_length = 0;
   _NSGetExecutablePath(NULL, &executable_length);
   DCHECK_GT(executable_length, 1u);
   std::string executable_path;
   int rv = _NSGetExecutablePath(WriteInto(&executable_path, executable_length),
                                 &executable_length);
   DCHECK_EQ(rv, 0);
-  *path = FilePath(executable_path);
+  *path = base::FilePath(executable_path);
 }
 
 // Returns true if the module for |address| is found. |path| will contain
 // the path to the module. Note that |path| may not be absolute.
-bool GetModulePathForAddress(FilePath* path,
+bool GetModulePathForAddress(base::FilePath* path,
                              const void* address) WARN_UNUSED_RESULT;
 
-bool GetModulePathForAddress(FilePath* path, const void* address) {
+bool GetModulePathForAddress(base::FilePath* path, const void* address) {
   Dl_info info;
   if (dladdr(address, &info) == 0)
     return false;
-  *path = FilePath(info.dli_fname);
+  *path = base::FilePath(info.dli_fname);
   return true;
 }
 
 }  // namespace
 
 namespace base {
 
-bool PathProviderMac(int key, FilePath* result) {
+bool PathProviderMac(int key, base::FilePath* result) {
   switch (key) {
     case base::FILE_EXE:
       GetNSExecutablePath(result);
       return true;
     case base::FILE_MODULE:
       return GetModulePathForAddress(result,
           reinterpret_cast<const void*>(&base::PathProviderMac));
     case base::DIR_APP_DATA: {
       bool success = base::mac::GetUserDirectory(NSApplicationSupportDirectory,
                                                  result);
@@ skipping 37 matching lines @@
       return base::mac::GetUserDirectory(NSCachesDirectory, result);
     case base::DIR_HOME:
       *result = base::mac::NSStringToFilePath(NSHomeDirectory());
       return true;
     default:
       return false;
   }
 }
 
 }  // namespace base