Add FilePath to base namespace.

media/webm/chromeos/webm_encoder.h

Index: media/webm/chromeos/webm_encoder.h
diff --git a/media/webm/chromeos/webm_encoder.h b/media/webm/chromeos/webm_encoder.h
index d0e74143aa714b409b15255eb201ae8b1c171ec8..cced7320585cc93cff50eb9d4cb7787f9b707141 100644
--- a/media/webm/chromeos/webm_encoder.h
+++ b/media/webm/chromeos/webm_encoder.h
@@ -18,9 +18,12 @@ extern "C" {
 #include "third_party/libvpx/source/libvpx/vpx/vp8cx.h"
 }
 
-class FilePath;
 class SkBitmap;
 
+namespace base {
+class FilePath;
+}
+
 namespace media {
 
 namespace chromeos {
@@ -33,7 +36,7 @@ class MEDIA_EXPORT WebmEncoder {
  public:
   // Create new instance for writing to |output_path|. If |realtime| is |true|,
   // uses realtime deadline, otherwise - "good quality" deadline.
-  WebmEncoder(const FilePath& output_path, int bitrate, bool realtime);
+  WebmEncoder(const base::FilePath& output_path, int bitrate, bool realtime);
   ~WebmEncoder();
 
   // Encodes video from a Nx(N*M) sprite, having M frames of size NxN with FPS
@@ -87,7 +90,7 @@ class MEDIA_EXPORT WebmEncoder {
   // Stack with start offsets of currently open sub-elements.
   std::stack<long int> ebml_sub_elements_;
 
-  FilePath output_path_;
+  base::FilePath output_path_;
   FILE* output_;
 
   // True if an error occured while encoding/writing to file.