Add basic support for Latin1 strings to the API.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index 48cf266826dd53b6dae18a328a1959c206c12eb7..98352f4804e2b49723af9d33bab6b86f74049213 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -48,6 +48,7 @@
 #include "snapshot.h"
 #include "store-buffer.h"
 #include "v8threads.h"
+#include "v8utils.h"
 #include "vm-state-inl.h"
 #if V8_TARGET_ARCH_ARM && !V8_INTERPRETED_REGEXP
 #include "regexp-macro-assembler.h"
@@ -4392,6 +4393,23 @@ MaybeObject* Heap::AllocateStringFromUtf8Slow(Vector<const char> string,
 }
 
 
+MaybeObject* Heap::AllocateStringFromLatin1Slow(Vector<const char> string,
+                                                PretenureFlag pretenure) {
+  int chars = string.length();
+  Object* result;
+  { MaybeObject* maybe_result = AllocateRawTwoByteString(chars, pretenure);
+    if (!maybe_result->ToObject(&result)) return maybe_result;
+  }
+
+  // Convert and copy the characters into the new object.
+  SeqTwoByteString* string_result = SeqTwoByteString::cast(result);
+  CopyChars(string_result->GetChars(),
+            reinterpret_cast<const unsigned char*>(string.start()),
+            chars);
+  return result;
+}
+
+
 MaybeObject* Heap::AllocateStringFromTwoByte(Vector<const uc16> string,
                                              PretenureFlag pretenure) {
   // Check if the string is an ASCII string.