Check whether the Pepper CDM is available before adding the key system.

content/browser/plugin_service_impl.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 "content/browser/plugin_service_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
@@ skipping 640 matching lines @@
   ComputePepperPluginList(&ppapi_plugins_);
   for (size_t i = 0; i < ppapi_plugins_.size(); ++i) {
     RegisterInternalPlugin(ppapi_plugins_[i].ToWebPluginInfo(), true);
   }
 }
 
 // There should generally be very few plugins so a brute-force search is fine.
 PepperPluginInfo* PluginServiceImpl::GetRegisteredPpapiPluginInfo(
     const base::FilePath& plugin_path) {
   PepperPluginInfo* info = NULL;
-  for (size_t i = 0; i < ppapi_plugins_.size(); i++) {
+  for (size_t i = 0; i < ppapi_plugins_.size(); ++i) {
     if (ppapi_plugins_[i].path == plugin_path) {
       info = &ppapi_plugins_[i];
       break;
     }
   }
   if (info)
     return info;
   // We did not find the plugin in our list. But wait! the plugin can also
   // be a latecomer, as it happens with pepper flash. This information
   // can be obtained from the PluginList singleton and we can use it to
@@ skipping 163 matching lines @@
           window, kPluginVersionAtomProperty, plugin_version);
   return true;
 }
 
 bool PluginServiceImpl::IsPluginWindow(HWND window) {
   return gfx::GetClassName(window) == base::string16(kNativeWindowClassName);
 }
 #endif
 
 }  // namespace content