Add a UMA stat to track if the Browser blacklist is Set on the Renderer

chrome_elf/blacklist/blacklist.h

 // 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.
 
 #ifndef CHROME_ELF_BLACKLIST_BLACKLIST_H_
 #define CHROME_ELF_BLACKLIST_BLACKLIST_H_
 
 namespace blacklist {
 
 // Max size of the DLL blacklist.
@@ skipping 29 matching lines @@
 bool LeaveSetupBeacon();
 
 // Looks for the beacon that LeaveSetupBeacon() creates and resets it to
 // to show the setup was successful.
 // Returns true if the beacon was successfully set to BLACKLIST_ENABLED.
 bool ResetBeacon();
 
 // Return the size of the current blacklist.
 int BlacklistSize();
 
+// Returns if true if the blacklist has been initialized.
+extern "C" bool IsBlacklistInitialized();
+
 // Adds the given dll name to the blacklist. Returns true if the dll name is in
 // the blacklist when this returns, false on error. Note that this will copy
 // |dll_name| and will leak it on exit if the string is not subsequently removed
 // using RemoveDllFromBlacklist.
 extern "C" bool AddDllToBlacklist(const wchar_t* dll_name);
 
 // Removes the given dll name from the blacklist. Returns true if it was
 // removed, false on error.
 extern "C" bool RemoveDllFromBlacklist(const wchar_t* dll_name);
 
 // Initializes the DLL blacklist in the current process. This should be called
 // before any undesirable DLLs might be loaded. If |force| is set to true, then
 // initialization will take place even if a beacon is present. This is useful
 // for tests.
 bool Initialize(bool force);
 
 }  // namespace blacklist
 
 #endif  // CHROME_ELF_BLACKLIST_BLACKLIST_H_