Fixing --verify-predictable mode.

src/heap/gc-tracer.h

 // Copyright 2014 the V8 project 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 V8_HEAP_GC_TRACER_H_
 #define V8_HEAP_GC_TRACER_H_
 
 #include "src/base/platform/platform.h"
 #include "src/globals.h"
 
@@ skipping 125 matching lines @@
       SCAVENGER_CODE_FLUSH_CANDIDATES,
       SCAVENGER_OBJECT_GROUPS,
       SCAVENGER_OLD_TO_NEW_POINTERS,
       SCAVENGER_ROOTS,
       SCAVENGER_SCAVENGE,
       SCAVENGER_SEMISPACE,
       SCAVENGER_WEAK,
       NUMBER_OF_SCOPES
     };
 
-    Scope(GCTracer* tracer, ScopeId scope) : tracer_(tracer), scope_(scope) {
-      start_time_ = base::OS::TimeCurrentMillis();
-    }
-
-    ~Scope() {
-      DCHECK(scope_ < NUMBER_OF_SCOPES);  // scope_ is unsigned.
-      tracer_->current_.scopes[scope_] +=
-          base::OS::TimeCurrentMillis() - start_time_;
-    }
+    Scope(GCTracer* tracer, ScopeId scope);
+    ~Scope();
 
    private:
     GCTracer* tracer_;
     ScopeId scope_;
     double start_time_;
 
     DISALLOW_COPY_AND_ASSIGN(Scope);
   };
 
 
@@ skipping 426 matching lines @@
 
   // Counts how many tracers were started without stopping.
   int start_counter_;
 
   DISALLOW_COPY_AND_ASSIGN(GCTracer);
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_GC_TRACER_H_