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

chrome/installer/util/helper.cc

Index: chrome/installer/util/helper.cc
diff --git a/chrome/installer/util/helper.cc b/chrome/installer/util/helper.cc
index 76ff16963ab975e797d3f6cc444f530aef44a714..52580a4299d1c87715a82cfe05e00a323dca0589 100644
--- a/chrome/installer/util/helper.cc
+++ b/chrome/installer/util/helper.cc
@@ -16,9 +16,9 @@
 
 namespace {
 
-FilePath GetChromeInstallBasePath(bool system,
-                                  BrowserDistribution* distribution,
-                                  const wchar_t* sub_path) {
+base::FilePath GetChromeInstallBasePath(bool system,
+                                        BrowserDistribution* distribution,
+                                        const wchar_t* sub_path) {
   base::FilePath install_path;
   if (system) {
     PathService::Get(base::DIR_PROGRAM_FILES, &install_path);
@@ -38,7 +38,8 @@ FilePath GetChromeInstallBasePath(bool system,
 
 namespace installer {
 
-FilePath GetChromeInstallPath(bool system_install, BrowserDistribution* dist) {
+base::FilePath GetChromeInstallPath(bool system_install,
+                                    BrowserDistribution* dist) {
   return GetChromeInstallBasePath(system_install, dist, kInstallBinaryDir);
 }