Fix the histograms whitelist for the OOP PDF plugin. (try 2)

chrome/common/chrome_content_client.h

 // 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.
 
 #ifndef CHROME_COMMON_CHROME_CONTENT_CLIENT_H_
 #define CHROME_COMMON_CHROME_CONTENT_CLIENT_H_
 
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "content/public/common/content_client.h"
 
 #if defined(ENABLE_PLUGINS)
 #include "content/public/common/pepper_plugin_info.h"
 #endif
 
 // Returns the user agent of Chrome.
 std::string GetUserAgent();
 
 class ChromeContentClient : public content::ContentClient {
  public:
-  static const char* const kPDFPluginName;
-  static const char* const kPDFPluginPath;
-  static const char* const kRemotingViewerPluginPath;
+  static const char kPDFPluginName[];
+  static const char kPDFPluginPath[];
+  static const char kRemotingViewerPluginPath[];
 
   // The methods below are called by child processes to set the function
   // pointers for built-in plugins. We avoid linking these plugins into
   // chrome_common because then on Windows we would ship them twice because of
   // the split DLL.
 #if defined(ENABLE_REMOTING)
   static void SetRemotingEntryFunctions(
       content::PepperPluginInfo::GetInterfaceFunc get_interface,
       content::PepperPluginInfo::PPP_InitializeModuleFunc initialize_module,
       content::PepperPluginInfo::PPP_ShutdownModuleFunc shutdown_module);
@@ skipping 31 matching lines @@
   std::string GetProcessTypeNameInEnglish(int type) override;
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
   bool GetSandboxProfileForSandboxType(
       int sandbox_type,
       int* sandbox_profile_resource_id) const override;
 #endif
 };
 
 #endif  // CHROME_COMMON_CHROME_CONTENT_CLIENT_H_