Report PPAPI plugin load error code to UMA.

content/ppapi_plugin/ppapi_thread.h

Index: content/ppapi_plugin/ppapi_thread.h
diff --git a/content/ppapi_plugin/ppapi_thread.h b/content/ppapi_plugin/ppapi_thread.h
index faf85c7e3e35ed91956ee9d73cc8212315370421..9b4018905878e04ec38c042eb22a6cb6f4f46307 100644
--- a/content/ppapi_plugin/ppapi_thread.h
+++ b/content/ppapi_plugin/ppapi_thread.h
@@ -112,6 +112,10 @@ class PpapiThread : public ChildThread,
 
   void ReportLoadResult(const base::FilePath& path, LoadResult result);
 
+  // Reports |error| to UMA when plugin load fails.
+  void ReportLoadErrorCode(const base::FilePath& path,
+                           const base::NativeLibraryLoadError& error);
+
   // True if running in a broker process rather than a normal plugin process.
   bool is_broker_;