Migrate DevToolsFileSystemIndexer to base::FileProxy

chrome/browser/devtools/devtools_file_system_indexer.h

Index: chrome/browser/devtools/devtools_file_system_indexer.h
diff --git a/chrome/browser/devtools/devtools_file_system_indexer.h b/chrome/browser/devtools/devtools_file_system_indexer.h
index 2f1322670c3f7ddba1eb25fb5328bc475d1076b6..828e2cd7b4780a00f53dbea5387a3be119dbf166 100644
--- a/chrome/browser/devtools/devtools_file_system_indexer.h
+++ b/chrome/browser/devtools/devtools_file_system_indexer.h
@@ -10,9 +10,8 @@
 #include <vector>
 
 #include "base/callback.h"
-#include "base/files/file.h"
+#include "base/files/file_proxy.h"
 #include "base/memory/ref_counted.h"
-#include "base/platform_file.h"
 
 class Profile;
 
@@ -52,9 +51,7 @@ class DevToolsFileSystemIndexer
     void StopOnFileThread();
     void CollectFilesToIndex();
     void IndexFiles();
-    void StartFileIndexing(base::File::Error error,
-                           base::PassPlatformFile pass_file,
-                           bool);
+    void StartFileIndexing(base::File::Error error);
     void ReadFromFile();
     void OnRead(base::File::Error error,
                 const char* data,
@@ -72,7 +69,7 @@ class DevToolsFileSystemIndexer
     typedef std::map<base::FilePath, base::Time> FilePathTimesMap;
     FilePathTimesMap file_path_times_;
     FilePathTimesMap::const_iterator indexing_it_;
-    base::PlatformFile current_file_;
+    base::FileProxy current_file_;
     int64 current_file_offset_;
     typedef int32 Trigram;
     std::vector<Trigram> current_trigrams_;