Reduce boot-up memory use of V8.

src/platform.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 394 matching lines @@
  public:
   // Opaque data type for thread-local storage keys.
   // LOCAL_STORAGE_KEY_MIN_VALUE and LOCAL_STORAGE_KEY_MAX_VALUE are specified
   // to ensure that enumeration type has correct value range (see Issue 830 for
   // more details).
   enum LocalStorageKey {
     LOCAL_STORAGE_KEY_MIN_VALUE = kMinInt,
     LOCAL_STORAGE_KEY_MAX_VALUE = kMaxInt
   };
 
-  struct Options {
-    Options() : name("v8:<unknown>"), stack_size(0) {}
+  class Options {
+   public:
+    Options() : name_("v8:<unknown>"), stack_size_(0) {}
+    Options(const char* name, int stack_size = 0)
+        : name_(name), stack_size_(stack_size) {}
 
-    const char* name;
-    int stack_size;
+    const char* name() const { return name_; }
+    int stack_size() const { return stack_size_; }
+
+   private:
+    const char* name_;
+    int stack_size_;
   };
 
   // Create new thread.
   explicit Thread(const Options& options);
-  explicit Thread(const char* name);
   virtual ~Thread();
 
   // Start new thread by calling the Run() method in the new thread.
   void Start();
 
   // Wait until thread terminates.
   void Join();
 
   inline const char* name() const {
     return name_;
@@ skipping 253 matching lines @@
   Atomic32 active_;
   PlatformData* data_;  // Platform specific data.
   int samples_taken_;  // Counts stack samples taken.
   DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_PLATFORM_H_