Report PPAPI plugin load error code to UMA.

content/common/plugin_list_posix.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/plugin_list.h"
 
 #include <algorithm>
 #include <dlfcn.h>
 #if defined(OS_OPENBSD)
 #include <sys/exec_elf.h>
@@ skipping 222 matching lines @@
   base::FilePath path = base::FilePath(
       std::string(info->path, path_end - info->path));
 
   if (!ELFMatchesCurrentArchitecture(path)) {
     LOG(WARNING) << path.value() << " is nspluginwrapper wrapping a "
                  << "plugin for a different architecture; it will "
                  << "work better if you instead use a native plugin.";
     return;
   }
 
-  std::string error;
+  base::NativeLibraryLoadError error = 0;
   void* newdl = base::LoadNativeLibrary(path, &error);
   if (!newdl) {
     // We couldn't load the unwrapped plugin for some reason, despite
     // being able to load the wrapped one.  Just use the wrapped one.
     LOG_IF(ERROR, PluginList::DebugPluginLoading())
         << "Could not use unwrapped nspluginwrapper plugin "
         << unwrapped_path->value() << " (" << error << "), "
         << "using the wrapped one.";
     return;
   }
@@ skipping 331 matching lines @@
   }
 
   // TODO(evanm): prefer the newest version of flash, etc. here?
 
   VLOG_IF(1, PluginList::DebugPluginLoading()) << "Using " << info.path.value();
 
   return true;
 }
 
 }  // namespace content