Report PPAPI plugin load error code to UMA.

chrome/plugin/chrome_content_plugin_client.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 "chrome/plugin/chrome_content_plugin_client.h"
 
 #if defined(ENABLE_REMOTING)
 #include "base/files/file_path.h"
 #include "base/path_service.h"
 #include "content/public/common/content_paths.h"
@@ skipping 12 matching lines @@
 #if defined(ENABLE_REMOTING)
 
   // Load crypto libraries for the Chromoting client plugin.
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && defined(USE_NSS)
   // On platforms where we use system NSS libraries, the .so's must be loaded
   // before the sandbox is initialized.
   crypto::ForceNSSNoDBInit();
   crypto::EnsureNSSInit();
 #elif defined(OS_WIN)
   // crypt32.dll is used to decode X509 certificates for Chromoting.
-  std::string error;
+  base::NativeLibraryLoadError error;
   if (base::LoadNativeLibrary(base::FilePath(L"crypt32.dll"), &error) == NULL)
-    LOG(ERROR) << "Failed to load crypto32.dll: " << error;
+    LOG(ERROR) << "Failed to load crypto32.dll: " << error.ToString();
 #endif // defined(OS_WIN)
 
   // Load media libraries for the Chromoting client plugin.
   base::FilePath media_path;
   PathService::Get(content::DIR_MEDIA_LIBS, &media_path);
   if (!media_path.empty())
     media::InitializeMediaLibrary(media_path);
 
 #endif // defined(ENABLE_REMOTING)
 }
 
 }  // namespace chrome