Add FilePath to base namespace.

content/public/test/test_launcher.h

Index: content/public/test/test_launcher.h
diff --git a/content/public/test/test_launcher.h b/content/public/test/test_launcher.h
index 6a5e2a63ab96a11af1606ce4e2f989c61f98687c..d3404e5da3945ebbfdc2351f82347eea0cfee2f3 100644
--- a/content/public/test/test_launcher.h
+++ b/content/public/test/test_launcher.h
@@ -11,9 +11,9 @@
 #include "base/compiler_specific.h"
 
 class CommandLine;
-class FilePath;
 
 namespace base {
+class FilePath;
 class RunLoop;
 }
 
@@ -39,8 +39,9 @@ class TestLauncherDelegate {
  public:
   virtual std::string GetEmptyTestName() = 0;
   virtual int RunTestSuite(int argc, char** argv) = 0;
-  virtual bool AdjustChildProcessCommandLine(CommandLine* command_line,
-                                             const FilePath& temp_data_dir) = 0;
+  virtual bool AdjustChildProcessCommandLine(
+      CommandLine* command_line,
+      const base::FilePath& temp_data_dir) = 0;
   virtual void PreRunMessageLoop(base::RunLoop* run_loop) {}
   virtual void PostRunMessageLoop() {}
   virtual ContentMainDelegate* CreateContentMainDelegate() = 0;