Refactor ScriptData class for cached compile data.

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 59c6a3693f796b484aa885837469a8a496ce256f..00c2667c1e38dfdabd73852f806d217b8f7bb150 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -31,6 +31,18 @@ namespace v8 {
 namespace internal {
 
 
+ScriptData::ScriptData(const byte* data, int length)
+    : owns_data_(false), data_(data), length_(length) {
+  if (!IsAligned(reinterpret_cast<intptr_t>(data), kPointerAlignment)) {
+    byte* copy = NewArray<byte>(length);
+    ASSERT(IsAligned(reinterpret_cast<intptr_t>(data_), kPointerAlignment));
+    CopyBytes(copy, data, length);
+    data_ = copy;
+    AcquireDataOwnership();
+  }
+}
+
+
 CompilationInfo::CompilationInfo(Handle<Script> script,
                                  Zone* zone)
     : flags_(StrictModeField::encode(SLOPPY)),