Parser: Delay internalizing strings and values.

src/utils.h

Index: src/utils.h
diff --git a/src/utils.h b/src/utils.h
index a2e3be535d3dc017afdc70a343479c2378bc7771..67b8d79a5f6a586bc1cf1bc4c942798bebc10dcb 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -1572,6 +1572,36 @@ class StringBuilder : public SimpleStringBuilder {
 };
 
 
+bool DoubleToBoolean(double d);
+
+template <typename Stream>
+bool StringToArrayIndex(Stream* stream, uint32_t* index) {
+  uint16_t ch = stream->GetNext();
+
+  // If the string begins with a '0' character, it must only consist
+  // of it to be a legal array index.
+  if (ch == '0') {
+    *index = 0;
+    return !stream->HasMore();
+  }
+
+  // Convert string to uint32 array index; character by character.
+  int d = ch - '0';
+  if (d < 0 || d > 9) return false;
+  uint32_t result = d;
+  while (stream->HasMore()) {
+    d = stream->GetNext() - '0';
+    if (d < 0 || d > 9) return false;
+    // Check that the new result is below the 32 bit limit.
+    if (result > 429496729U - ((d > 5) ? 1 : 0)) return false;
+    result = (result * 10) + d;
+  }
+
+  *index = result;
+  return true;
+}
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_UTILS_H_