Move fileapi into its own component

webkit/fileapi/file_system_util.cc

Index: webkit/fileapi/file_system_util.cc
diff --git a/webkit/fileapi/file_system_util.cc b/webkit/fileapi/file_system_util.cc
index 0bfbb5e5b692491e50b0e2c70f8d491688e371ce..985c021ac4beb2646c22be9e54979f015474e388 100644
--- a/webkit/fileapi/file_system_util.cc
+++ b/webkit/fileapi/file_system_util.cc
@@ -249,4 +249,31 @@ FilePath StringToFilePath(const std::string& file_path_string) {
 #endif
 }
 
+WebKit::WebFileError PlatformFileErrorToWebFileError(
+    base::PlatformFileError error_code) {
+  switch (error_code) {
+    case base::PLATFORM_FILE_ERROR_NOT_FOUND:
+      return WebKit::WebFileErrorNotFound;
+    case base::PLATFORM_FILE_ERROR_INVALID_OPERATION:
+    case base::PLATFORM_FILE_ERROR_EXISTS:
+    case base::PLATFORM_FILE_ERROR_NOT_EMPTY:
+      return WebKit::WebFileErrorInvalidModification;
+    case base::PLATFORM_FILE_ERROR_NOT_A_DIRECTORY:
+    case base::PLATFORM_FILE_ERROR_NOT_A_FILE:
+      return WebKit::WebFileErrorTypeMismatch;
+    case base::PLATFORM_FILE_ERROR_ACCESS_DENIED:
+      return WebKit::WebFileErrorNoModificationAllowed;
+    case base::PLATFORM_FILE_ERROR_FAILED:
+      return WebKit::WebFileErrorInvalidState;
+    case base::PLATFORM_FILE_ERROR_ABORT:
+      return WebKit::WebFileErrorAbort;
+    case base::PLATFORM_FILE_ERROR_SECURITY:
+      return WebKit::WebFileErrorSecurity;
+    case base::PLATFORM_FILE_ERROR_NO_SPACE:
+      return WebKit::WebFileErrorQuotaExceeded;
+    default:
+      return WebKit::WebFileErrorInvalidModification;
+  }
+}
+
 }  // namespace fileapi