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

base/base_paths_mac.mm

Index: base/base_paths_mac.mm
diff --git a/base/base_paths_mac.mm b/base/base_paths_mac.mm
index 630f742a9ffbd16ac5e3779b1a99065714227397..39a58143a60c23945e6e2659254c20a673d03c4f 100644
--- a/base/base_paths_mac.mm
+++ b/base/base_paths_mac.mm
@@ -21,7 +21,7 @@
 
 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.
@@ -32,19 +32,19 @@ void GetNSExecutablePath(FilePath* 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;
 }
 
@@ -52,7 +52,7 @@ bool GetModulePathForAddress(FilePath* path, const void* address) {
 
 namespace base {
 
-bool PathProviderMac(int key, FilePath* result) {
+bool PathProviderMac(int key, base::FilePath* result) {
   switch (key) {
     case base::FILE_EXE:
       GetNSExecutablePath(result);