Use the new dll injection blocking api of the sandbox to block...

chrome/browser/sandbox_policy.h

 // Copyright (c) 2006-2008 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_BROWSER_SANDBOX_POLICY_H__
-#define CHROME_BROWSER_SANDBOX_POLICY_H__
+#ifndef CHROME_BROWSER_SANDBOX_POLICY_H_
+#define CHROME_BROWSER_SANDBOX_POLICY_H_
 
 #include <string>
 #include "sandbox/src/sandbox.h"
 #include "webkit/activex_shim/activex_shared.h"
 
 // Adds the generic policy rules to a sandbox TargetPolicy.
 bool AddGenericPolicy(sandbox::TargetPolicy* policy);
 
+// Adds policy rules for unloaded the known dlls that cause chrome to crash.
+bool AddDllEvictionPolicy(sandbox::TargetPolicy* policy);
+
 // Adds the custom policy rules for a given plugin. If dll is activex-shim,
 // then clsid is the clsid of ActiveX control. Otherwise clsid is ignored.
 // |trusted_plugins| contains the comma separate list of plugins that should
 // not be sandboxed. The plugin in the list can be either the plugin dll name
 // of the class id if it's an ActiveX.
 bool AddPolicyForPlugin(const std::wstring &plugin_dll,
                         const std::string &activex_clsid,
                         const std::wstring &trusted_plugins,
                         sandbox::TargetPolicy* policy);
 
 enum PluginPolicyCategory {
   PLUGIN_GROUP_TRUSTED,
   PLUGIN_GROUP_UNTRUSTED,
 };
 
 // Returns the policy category for the plugin dll.
 PluginPolicyCategory GetPolicyCategoryForPlugin(
     const std::wstring& plugin_dll,
     const std::wstring& activex_clsid,
     const std::wstring& trusted_plugins);
 
 // Creates a sandbox without any restriction.
 bool ApplyPolicyForTrustedPlugin(sandbox::TargetPolicy* policy);
 
 // Creates a sandbox with the plugin running in a restricted environment.
 // Only the "Users" and "Everyone" groups are enabled in the token. The User SID
 // is disabled.
 bool ApplyPolicyForUntrustedPlugin(sandbox::TargetPolicy* policy);
 
-#endif  // CHROME_BROWSER_SANDBOX_POLICY_H__
+#endif  // CHROME_BROWSER_SANDBOX_POLICY_H_