Revert r11376 and r11379 due to compile failures on Windows.

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index a8bbc2f44172021916ba39dc0ed6b22c6ed03f08..bf9b345049ed7c6668c54891bd97c6a8c7b8665f 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -1854,9 +1854,6 @@ bool Isolate::Init(Deserializer* des) {
     LOG(this, LogCompiledFunctions());
   }
 
-  CHECK(OFFSET_OF(Isolate, state_) == Internals::kIsolateStateOffset);
-  CHECK(OFFSET_OF(Isolate, heap_.roots_) == Internals::kIsolateRootsOffset);
-
   state_ = INITIALIZED;
   time_millis_at_init_ = OS::TimeCurrentMillis();
   return true;