Add explicit base to FilePath.

content/shell/shell_browser_main.cc

Index: content/shell/shell_browser_main.cc
diff --git a/content/shell/shell_browser_main.cc b/content/shell/shell_browser_main.cc
index 9256cb350fad36bc3b1f54f6ce47ee806bee3678..cffd46421c29c682973ddd7b9b584eaeb77a4fd7 100644
--- a/content/shell/shell_browser_main.cc
+++ b/content/shell/shell_browser_main.cc
@@ -25,7 +25,7 @@
 namespace {
 
 GURL GetURLForLayoutTest(const std::string& test_name,
-                         FilePath* current_working_directory,
+                         base::FilePath* current_working_directory,
                          bool* enable_pixel_dumping,
                          std::string* expected_pixel_hash) {
   // A test name is formated like file:///path/to/test'--pixel-test'pixelhash
@@ -55,14 +55,14 @@ GURL GetURLForLayoutTest(const std::string& test_name,
 #if defined(OS_WIN)
     std::wstring wide_path_or_url =
         base::SysNativeMBToWide(path_or_url);
-    FilePath local_file(wide_path_or_url);
+    base::FilePath local_file(wide_path_or_url);
 #else
-    FilePath local_file(path_or_url);
+    base::FilePath local_file(path_or_url);
 #endif
     file_util::AbsolutePath(&local_file);
     test_url = net::FilePathToFileURL(local_file);
   }
-  FilePath local_path;
+  base::FilePath local_path;
   if (current_working_directory) {
     // We're outside of the message loop here, and this is a test.
     base::ThreadRestrictions::ScopedAllowIO allow_io;
@@ -142,7 +142,7 @@ int ShellBrowserMain(const content::MainFunctionParams& parameters) {
 
       bool enable_pixel_dumps;
       std::string pixel_hash;
-      FilePath cwd;
+      base::FilePath cwd;
       GURL test_url = GetURLForLayoutTest(
           test_string, &cwd, &enable_pixel_dumps, &pixel_hash);
       if (!content::WebKitTestController::Get()->PrepareForLayoutTest(