Remove limit for d8 shell input length.

src/d8.h

Index: src/d8.h
diff --git a/src/d8.h b/src/d8.h
index 6c7733ccfaf1a4bede8308f969c283ed70486c14..e9b417be7d0a90e6e8b0447f1038ce27dcea2e97 100644
--- a/src/d8.h
+++ b/src/d8.h
@@ -116,14 +116,13 @@ class CounterMap {
 #endif  // V8_SHARED
 
 
-#ifndef V8_SHARED
 class LineEditor {
  public:
   enum Type { DUMB = 0, READLINE = 1 };
   LineEditor(Type type, const char* name);
   virtual ~LineEditor() { }
 
-  virtual i::SmartArrayPointer<char> Prompt(const char* prompt) = 0;
+  virtual Handle<String> Prompt(const char* prompt) = 0;
   virtual bool Open() { return true; }
   virtual bool Close() { return true; }
   virtual void AddHistory(const char* str) { }
@@ -136,7 +135,6 @@ class LineEditor {
   LineEditor* next_;
   static LineEditor* first_;
 };
-#endif  // V8_SHARED
 
 
 class SourceGroup {
@@ -287,7 +285,10 @@ class Shell : public i::AllStatic {
   static Handle<Value> EnableProfiler(const Arguments& args);
   static Handle<Value> DisableProfiler(const Arguments& args);
   static Handle<Value> Read(const Arguments& args);
-  static Handle<Value> ReadLine(const Arguments& args);
+  static Handle<String> ReadFromStdin();
+  static Handle<Value> ReadLine(const Arguments& args) {
+    return ReadFromStdin();
+  }
   static Handle<Value> Load(const Arguments& args);
   static Handle<Value> ArrayBuffer(const Arguments& args);
   static Handle<Value> Int8Array(const Arguments& args);
@@ -335,11 +336,8 @@ class Shell : public i::AllStatic {
   static Handle<Value> RemoveDirectory(const Arguments& args);
 
   static void AddOSMethods(Handle<ObjectTemplate> os_template);
-#ifndef V8_SHARED
-  static const char* kHistoryFileName;
-  static const int kMaxHistoryEntries;
+
   static LineEditor* console;
-#endif  // V8_SHARED
   static const char* kPrompt;
   static ShellOptions options;