Inline Isolate::UncheckedCurrent into isolate.cc

BUG=2487
R=yangguo@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1467973002

Cr-Commit-Position: refs/heads/master@{#32165}

src/isolate.cc

@@ -1847,7 +1847,9 @@ void Isolate::TearDown() {
   // direct pointer. We don't use Enter/Exit here to avoid
   // initializing the thread data.
   PerIsolateThreadData* saved_data = CurrentPerIsolateThreadData();
-  Isolate* saved_isolate = UncheckedCurrent();
+  DCHECK(base::NoBarrier_Load(&isolate_key_created_) == 1);
+  Isolate* saved_isolate =
+      reinterpret_cast<Isolate*>(base::Thread::GetThreadLocal(isolate_key_));
   SetIsolateThreadLocals(this, NULL);
 
   Deinit();

src/isolate.h

@@ -481,14 +481,9 @@ class Isolate {
     return isolate;
   }
 
-  INLINE(static Isolate* UncheckedCurrent()) {
-    DCHECK(base::NoBarrier_Load(&isolate_key_created_) == 1);
-    return reinterpret_cast<Isolate*>(
-        base::Thread::GetThreadLocal(isolate_key_));
-  }
-
-  // Like UncheckedCurrent, but skips the check that |isolate_key_| was
-  // initialized. Callers have to ensure that themselves.
+  // Like Current, but skips the check that |isolate_key_| was initialized.
+  // Callers have to ensure that themselves.
+  // DO NOT USE. The only remaining callsite will be deleted soon.
   INLINE(static Isolate* UnsafeCurrent()) {
     return reinterpret_cast<Isolate*>(
         base::Thread::GetThreadLocal(isolate_key_));