Convert utility process CheckMediaFile IPC to mojo

chrome/utility/extensions/extensions_handler.cc

Index: chrome/utility/extensions/extensions_handler.cc
diff --git a/chrome/utility/extensions/extensions_handler.cc b/chrome/utility/extensions/extensions_handler.cc
index 9992d42ec90fe10e797ef4849fae210e8b7ba3ff..8d7e7dc6f0ee22d66b6c750e2fe806a6d2f53ba9 100644
--- a/chrome/utility/extensions/extensions_handler.cc
+++ b/chrome/utility/extensions/extensions_handler.cc
@@ -45,9 +45,11 @@
 
 namespace {
 
+#if defined(OS_WIN) || defined(OS_MACOSX)
 bool Send(IPC::Message* message) {
   return content::UtilityThread::Get()->Send(message);
 }
+#endif
 
 void ReleaseProcessIfNeeded() {
   content::UtilityThread::Get()->ReleaseProcessIfNeeded();
@@ -90,6 +92,20 @@ class MediaParserImpl : public extensions::mojom::MediaParser {
     ReleaseProcessIfNeeded();
   }
 
+  void CheckMediaFile(int64_t decode_time_ms,
+                      base::File file,
+                      const CheckMediaFileCallback& callback) override {
+#if !defined(MEDIA_DISABLE_FFMPEG)
+    media::MediaFileChecker checker(std::move(file));
+    const bool check_success =
+        checker.Start(base::TimeDelta::FromMilliseconds(decode_time_ms));
+    callback.Run(check_success);
+#else
+    callback.Run(false);
+#endif
+    ReleaseProcessIfNeeded();
+  }
+
   ChromeContentUtilityClient* const utility_client_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaParserImpl);
@@ -128,8 +144,6 @@ void ExtensionsHandler::ExposeInterfacesToBrowser(
 bool ExtensionsHandler::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ExtensionsHandler, message)
-    IPC_MESSAGE_HANDLER(ChromeUtilityMsg_CheckMediaFile, OnCheckMediaFile)
-
 #if defined(OS_WIN)
     IPC_MESSAGE_HANDLER(ChromeUtilityMsg_ParseITunesPrefXml,
                         OnParseITunesPrefXml)
@@ -155,21 +169,6 @@ bool ExtensionsHandler::OnMessageReceived(const IPC::Message& message) {
   return handled || utility_handler_.OnMessageReceived(message);
 }
 
-void ExtensionsHandler::OnCheckMediaFile(
-    int64_t milliseconds_of_decoding,
-    const IPC::PlatformFileForTransit& media_file) {
-#if !defined(MEDIA_DISABLE_FFMPEG)
-  media::MediaFileChecker checker(
-      IPC::PlatformFileForTransitToFile(media_file));
-  const bool check_success = checker.Start(
-      base::TimeDelta::FromMilliseconds(milliseconds_of_decoding));
-  Send(new ChromeUtilityHostMsg_CheckMediaFile_Finished(check_success));
-#else
-  Send(new ChromeUtilityHostMsg_CheckMediaFile_Finished(false));
-#endif
-  ReleaseProcessIfNeeded();
-}
-
 #if defined(OS_WIN)
 void ExtensionsHandler::OnParseITunesPrefXml(
     const std::string& itunes_xml_data) {