Report PPAPI plugin load error code to UMA.

base/native_library.h

Index: base/native_library.h
diff --git a/base/native_library.h b/base/native_library.h
index d7513d0b050e181b4df913e276b39051aef5318f..d5a18130a2753b64e1da38bfda236fbf733216a6 100644
--- a/base/native_library.h
+++ b/base/native_library.h
@@ -50,11 +50,14 @@ typedef NativeLibraryStruct* NativeLibrary;
 typedef void* NativeLibrary;
 #endif  // OS_*
 
-// Loads a native library from disk.  Release it with UnloadNativeLibrary when
+// Loads a native library from disk.  Releases it with UnloadNativeLibrary when

[ddorwin, 2014/03/21 04:20:06]

"Release" was correct. Maybe "The caller must release..." would be clearer.

[xhwang, 2014/03/21 17:09:18]

Done.

 // you're done.  Returns NULL on failure.
-// If |error| is not NULL, it may be filled in with an error message on error.
+// If |error_message| or |error_code| is not NULL, they may be filled in with
+// an error message or an error code respectively on load error if the platform

[ddorwin, 2014/03/21 04:20:06]

nit:
, respectively,

[xhwang, 2014/03/21 17:09:18]

Done.

+// supports it.
 BASE_EXPORT NativeLibrary LoadNativeLibrary(const FilePath& library_path,
-                                            std::string* error);
+                                            std::string* error_message,
+                                            uint32* error_code = NULL);
 
 #if defined(OS_WIN)
 // Loads a native library from disk.  Release it with UnloadNativeLibrary when