Add media file validation to utility process

chrome/app/chrome_main_delegate.cc

Index: chrome/app/chrome_main_delegate.cc
diff --git a/chrome/app/chrome_main_delegate.cc b/chrome/app/chrome_main_delegate.cc
index 1daec10d9ec8012c6a1c15d740da95405f9ef8b8..786a28da5316a5eaa29b2fc1c9a4190af67baf2e 100644
--- a/chrome/app/chrome_main_delegate.cc
+++ b/chrome/app/chrome_main_delegate.cc
@@ -5,6 +5,7 @@
 #include "chrome/app/chrome_main_delegate.h"
 
 #include "base/command_line.h"
+#include "base/files/file_path.h"
 #include "base/lazy_instance.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/stats_counters.h"
@@ -693,8 +694,11 @@ void ChromeMainDelegate::PreSandboxStartup() {
 #endif  // defined(OS_MACOSX)
 
 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
-    if (process_type == switches::kUtilityProcess)
-      chrome::ChromeContentUtilityClient::PreSandboxStartup();
+    if (process_type == switches::kUtilityProcess) {
+      base::FilePath media_path;
+      PathService::Get(content::DIR_MEDIA_LIBS, &media_path);
+      chrome::ChromeContentUtilityClient::PreSandboxStartup(media_path);
+    }
 #endif
   }