Replace FilePath with base::FilePath in some more top level directories.

media/tools/media_bench/media_bench.cc

Index: media/tools/media_bench/media_bench.cc
diff --git a/media/tools/media_bench/media_bench.cc b/media/tools/media_bench/media_bench.cc
index 9d3e070eb72073a2fd4a7b2559721720a452b12d..6910e7e073c3a8b018683ac2c42f674e0748feff 100644
--- a/media/tools/media_bench/media_bench.cc
+++ b/media/tools/media_bench/media_bench.cc
@@ -126,7 +126,7 @@ int main(int argc, const char** argv) {
   }
 
   // Initialize our media library (try loading DLLs, etc.) before continuing.
-  FilePath media_path;
+  base::FilePath media_path;
   PathService::Get(base::DIR_MODULE, &media_path);
   if (!media::InitializeMediaLibrary(media_path)) {
     std::cerr << "Unable to initialize the media library." << std::endl;
@@ -134,10 +134,10 @@ int main(int argc, const char** argv) {
   }
 
   // Retrieve command line options.
-  FilePath in_path(filenames[0]);
-  FilePath out_path;
+  base::FilePath in_path(filenames[0]);
+  base::FilePath out_path;
   if (filenames.size() > 1)
-    out_path = FilePath(filenames[1]);
+    out_path = base::FilePath(filenames[1]);
   AVMediaType target_codec = AVMEDIA_TYPE_UNKNOWN;
 
   // Determine whether to benchmark audio or video decoding.