[Base] Clock state now unaltered by threading.

- Removed tick and time values from ThreadSavedState.
- Removed affiliated get/set code from Save and Restore.
- Removed dangerous SetGuestTickCount method.

src/xenia/base/clock.cc

@@ -126,13 +126,6 @@ uint32_t Clock::QueryGuestUptimeMillis() {
                          std::numeric_limits<uint32_t>::max()));
 }
 
-void Clock::SetGuestTickCount(uint64_t tick_count) {
-  std::lock_guard<std::mutex> lock(tick_mutex_);
-
-  last_host_tick_count_ = Clock::QueryHostTickCount();
-  last_guest_tick_count_ = tick_count;
-}
-
 void Clock::SetGuestSystemTime(uint64_t system_time) {
   // Query the filetime offset to calculate a new base time.
   auto guest_system_time_offset = QueryGuestSystemTimeOffset();

src/xenia/base/clock.h

@@ -2,7 +2,7 @@
  ******************************************************************************
  * Xenia : Xbox 360 Emulator Research Project                                 *
  ******************************************************************************
- * Copyright 2015 Ben Vanik. All rights reserved.                             *
+ * Copyright 2019 Ben Vanik. All rights reserved.                             *
  * Released under the BSD license - see LICENSE in the root for more details. *
  ******************************************************************************
  */
@@ -47,9 +47,7 @@ class Clock {
   // Queries the milliseconds since the guest began, accounting for scaling.
   static uint32_t QueryGuestUptimeMillis();
 
-  // Sets the guest tick count for the current thread.
-  static void SetGuestTickCount(uint64_t tick_count);
-  // Sets the system time for the current thread.
+  // Sets the system time of the guest.
   static void SetGuestSystemTime(uint64_t system_time);
 
   // Scales a time duration in milliseconds, from guest time.