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

chrome/common/chrome_content_client.h

Index: chrome/common/chrome_content_client.h
diff --git a/chrome/common/chrome_content_client.h b/chrome/common/chrome_content_client.h
index fd00d31722aad9b75f3d44d004546546db05709a..9e76754e89037fbd324bcf4f972931b8641335b4 100644
--- a/chrome/common/chrome_content_client.h
+++ b/chrome/common/chrome_content_client.h
@@ -21,9 +21,9 @@ 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