Add FilePath to base namespace.

chrome/test/logging/win/log_file_reader.h

Index: chrome/test/logging/win/log_file_reader.h
diff --git a/chrome/test/logging/win/log_file_reader.h b/chrome/test/logging/win/log_file_reader.h
index 762a840cdbf3c0803f7ac85be955a7ae5d2f3731..aca4b0acea46fab565126c4696b875fce1dac5cc 100644
--- a/chrome/test/logging/win/log_file_reader.h
+++ b/chrome/test/logging/win/log_file_reader.h
@@ -17,7 +17,9 @@
 #include "base/logging.h"
 #include "base/string_piece.h"
 
+namespace base {
 class FilePath;
+}
 
 namespace logging_win {
 
@@ -69,7 +71,7 @@ class LogFileDelegate {
 // parsed.  Although it is safe to call this from multiple threads, only one
 // file may be read at a time; other threads trying to read other log files will
 // be blocked waiting.
-void ReadLogFile(const FilePath& log_file, LogFileDelegate* delegate);
+void ReadLogFile(const base::FilePath& log_file, LogFileDelegate* delegate);
 
 }  // namespace logging_win