Bug 1324926 - Log Gecko version and buildID in GMP log. r=gerald

MozReview-Commit-ID: 3QLi8aCrqUF

--HG--
extra : rebase_source : 7148b586bd82cc042db9f76101c962d078cff8d6

dom/media/gmp/GMPService.cpp

@@ -18,6 +18,7 @@
 #include "nsXPCOMPrivate.h"
 #include "mozilla/Services.h"
 #include "nsNativeCharsetUtils.h"
+#include "nsIXULAppInfo.h"
 #include "nsIConsoleService.h"
 #include "mozilla/Unused.h"
 #include "GMPDecryptorParent.h"
@@ -151,6 +152,17 @@ GeckoMediaPluginService::GeckoMediaPluginService()
   , mShuttingDownOnGMPThread(false)
 {
   MOZ_ASSERT(NS_IsMainThread());
+
+  nsCOMPtr<nsIXULAppInfo> appInfo = do_GetService("@mozilla.org/xre/app-info;1");
+  if (appInfo) {
+    nsAutoCString version;
+    nsAutoCString buildID;
+    if (NS_SUCCEEDED(appInfo->GetVersion(version)) &&
+        NS_SUCCEEDED(appInfo->GetAppBuildID(buildID))) {
+      LOGD(("GeckoMediaPluginService created; Gecko version=%s buildID=%s",
+            version.get(), buildID.get()));
+    }
+  }
 }
 
 GeckoMediaPluginService::~GeckoMediaPluginService()