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

media/video/capture/screen/screen_capturer_win.cc

Index: media/video/capture/screen/screen_capturer_win.cc
diff --git a/media/video/capture/screen/screen_capturer_win.cc b/media/video/capture/screen/screen_capturer_win.cc
index 796af5f85ea86b648598767a10e3fb9ef8914cdb..65fc65470b3cfdf7f4d1eed5c7a101f7f8a3de85 100644
--- a/media/video/capture/screen/screen_capturer_win.cc
+++ b/media/video/capture/screen/screen_capturer_win.cc
@@ -267,7 +267,8 @@ void ScreenCapturerWin::Start(Delegate* delegate) {
 
   // Load dwmapi.dll dynamically since it is not available on XP.
   if (!dwmapi_library_.is_valid()) {
-    FilePath path(base::GetNativeLibraryName(UTF8ToUTF16(kDwmapiLibraryName)));
+    base::FilePath path(base::GetNativeLibraryName(
+        UTF8ToUTF16(kDwmapiLibraryName)));
     dwmapi_library_.Reset(base::LoadNativeLibrary(path, NULL));
   }