Convert utility process extension ParseUpdate IPC to mojo

extensions/browser/updater/safe_manifest_parser.h

Index: extensions/browser/updater/safe_manifest_parser.h
diff --git a/extensions/browser/updater/safe_manifest_parser.h b/extensions/browser/updater/safe_manifest_parser.h
index 3f852fe68a579ce08a240a5aa5a5ef934c1259c5..b3e953eed1ab9692bf5b1894aaf3e0d8ae4fb03c 100644
--- a/extensions/browser/updater/safe_manifest_parser.h
+++ b/extensions/browser/updater/safe_manifest_parser.h
@@ -5,49 +5,19 @@
 #ifndef EXTENSIONS_BROWSER_UPDATER_SAFE_MANIFEST_PARSER_H_
 #define EXTENSIONS_BROWSER_UPDATER_SAFE_MANIFEST_PARSER_H_
 
-#include <memory>
 #include <string>
 
-#include "base/callback.h"
-#include "base/macros.h"
-#include "content/public/browser/utility_process_host_client.h"
-#include "extensions/browser/updater/manifest_fetch_data.h"
+#include "base/callback_forward.h"
 #include "extensions/common/update_manifest.h"
 
 namespace extensions {
 
-// Utility class to handle doing xml parsing in a sandboxed utility process.
-class SafeManifestParser : public content::UtilityProcessHostClient {
- public:
-  // Callback that is invoked when the manifest results are ready.
-  typedef base::Callback<void(const UpdateManifest::Results*)> ResultsCallback;
-
-  SafeManifestParser(const std::string& xml,
-                     const ResultsCallback& results_callback);
-
-  // Posts a task over to the IO loop to start the parsing of xml_ in a
-  // utility process.
-  void Start();
-
- private:
-  ~SafeManifestParser() override;
-
-  // Creates the sandboxed utility process and tells it to start parsing.
-  void ParseInSandbox();
-
-  // content::UtilityProcessHostClient implementation.
-  bool OnMessageReceived(const IPC::Message& message) override;
-
-  void OnParseUpdateManifestSucceeded(const UpdateManifest::Results& results);
-  void OnParseUpdateManifestFailed(const std::string& error_message);
-
-  const std::string xml_;
-
-  // Should be accessed only on UI thread.
-  ResultsCallback results_callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(SafeManifestParser);
-};
+// Parses an update manifest |xml| safely in a utility process and calls
+// |callback| with the results, which will be null on failure. Runs on
+// the UI thread.
+void ParseUpdateManifest(
+    const std::string& xml,
+    const base::Callback<void(const UpdateManifest::Results*)>& callback);
 
 }  // namespace extensions