allow unit_tests to re-create service manager context.

content/browser/child_process_launcher_helper_posix.h

Index: content/browser/child_process_launcher_helper_posix.h
diff --git a/content/browser/child_process_launcher_helper_posix.h b/content/browser/child_process_launcher_helper_posix.h
index 8316ab903f87042813d47283233b799db1101d98..059e567cd795003603d3fd710bdd65124eee4a49 100644
--- a/content/browser/child_process_launcher_helper_posix.h
+++ b/content/browser/child_process_launcher_helper_posix.h
@@ -43,6 +43,9 @@ std::unique_ptr<FileDescriptorInfo> CreateDefaultPosixFilesToMap(
 void SetFilesToShareForServicePosix(const std::string& service_name,
                                     catalog::RequiredFileMap required_files);
 
+// Called from unit_tests in order to reset all previously registered files.
+void ResetFilesToShareForTestingPosix();
+
 // Opens the file in read mode at the given path. Note that the path should be
 // relative and the way it is resolved is platform specific.
 // |region| is set to the region of the file that should be read.
@@ -53,4 +56,4 @@ base::File OpenFileToShare(const base::FilePath& path,
 
 }  // namespace content
 
-#endif  // CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_HELPER_POSIX_H_
+#endif  // CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_HELPER_POSIX_H_