Report PPAPI plugin load error code to UMA.

chrome/renderer/chrome_render_process_observer.cc

 // Copyright (c) 2012 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/renderer/chrome_render_process_observer.h"
 
 #include <limits>
 #include <vector>
 
 #include "base/allocator/allocator_extension.h"
@@ skipping 276 matching lines @@
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && defined(USE_NSS)
   // On platforms where we use system NSS shared libraries,
   // initialize NSS now because it won't be able to load the .so's
   // after we engage the sandbox.
   if (!command_line.HasSwitch(switches::kSingleProcess))
     crypto::InitNSSSafely();
 #elif defined(OS_WIN)
   // crypt32.dll is used to decode X509 certificates for Chromoting.
   // Only load this library when the feature is enabled.
-  std::string error;
+  base::NativeLibraryLoadError error = 0;
   base::LoadNativeLibrary(base::FilePath(L"crypt32.dll"), &error);

[ddorwin, 2014/03/21 20:06:32]

just pass NULL

[xhwang, 2014/03/21 22:33:28]

Done.

 #endif
   // Setup initial set of crash dump data for Field Trials in this renderer.
   chrome_variations::SetChildProcessLoggingVariationList();
 }
 
 ChromeRenderProcessObserver::~ChromeRenderProcessObserver() {
 }
 
 bool ChromeRenderProcessObserver::OnControlMessageReceived(
     const IPC::Message& message) {
@@ skipping 98 matching lines @@
   if (clear_cache_pending_ && webkit_initialized_) {
     clear_cache_pending_ = false;
     WebCache::clear();
   }
 }
 
 const RendererContentSettingRules*
 ChromeRenderProcessObserver::content_setting_rules() const {
   return &content_setting_rules_;
 }