Ensure that the DirectWrite font cache works in Chrome canary on Windows 8+ with AppContainer prote…

sandbox/win/src/sandbox_policy_base.h

Index: sandbox/win/src/sandbox_policy_base.h
diff --git a/sandbox/win/src/sandbox_policy_base.h b/sandbox/win/src/sandbox_policy_base.h
index 587d7934d3b24dc57a75788a9b4d26a48c9e2b4b..7a710322ce59424c47d34664c0aa7f1c15459df4 100644
--- a/sandbox/win/src/sandbox_policy_base.h
+++ b/sandbox/win/src/sandbox_policy_base.h
@@ -67,6 +67,8 @@ class PolicyBase : public Dispatcher, public TargetPolicy {
   ResultCode AddDllToUnload(const wchar_t* dll_name) override;
   ResultCode AddKernelObjectToClose(const base::char16* handle_type,
                                     const base::char16* handle_name) override;
+  void AddHandleToShare(HANDLE handle) override;
+  HandleList GetHandlesBeingShared() override;
 
   // Dispatcher:
   Dispatcher* OnMessageReady(IPCParams* ipc,
@@ -163,6 +165,11 @@ class PolicyBase : public Dispatcher, public TargetPolicy {
   static HWINSTA alternate_winstation_handle_;
   static IntegrityLevel alternate_desktop_integrity_level_label_;
 
+  // Contains the list of handles being shared with the target process.
+  // This list contains handles other than the stderr/stdout handles which are
+  // shared with the target at times.
+  std::vector<HANDLE> handles_to_share_;
+
   DISALLOW_COPY_AND_ASSIGN(PolicyBase);
 };