Instrument pepper plugin load failures.

content/renderer/render_frame_impl.cc

 // Copyright 2013 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/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 460 matching lines @@
   bool pepper_plugin_was_registered = false;
   scoped_refptr<PluginModule> pepper_module(PluginModule::Create(
       this, info, &pepper_plugin_was_registered));
   if (pepper_plugin_was_registered) {
     if (pepper_module.get()) {
       // TODO(jam): change to take RenderFrame.
       return new PepperWebPluginImpl(
           pepper_module.get(), params, render_view_->AsWeakPtr(), this);
     }
   }
-
+#if defined(OS_CHROMEOS)
+  LOG(WARNING) << "Pepper module/plugin creation failed.";
+  return NULL;
+#else
   // TODO(jam): change to take RenderFrame.
   return new WebPluginImpl(frame, params, info.path, render_view_->AsWeakPtr(),
                            this);
+#endif
 #else
   return NULL;
 #endif
 }
 
 // blink::WebFrameClient implementation ----------------------------------------
 
 blink::WebPlugin* RenderFrameImpl::createPlugin(
     blink::WebFrame* frame,
     const blink::WebPluginParams& params) {
@@ skipping 839 matching lines @@
 void RenderFrameImpl::AddObserver(RenderFrameObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void RenderFrameImpl::RemoveObserver(RenderFrameObserver* observer) {
   observer->RenderFrameGone();
   observers_.RemoveObserver(observer);
 }
 
 }  // namespace content