[Isolates] Merge crankshaft (r5922 from bleeding_edge).

src/utils.cc

Index: src/utils.cc
diff --git a/src/utils.cc b/src/utils.cc
index 7096ba35ab26ea37f9d758050a5ea904fb084440..2c234bb76225ced2e5012c16fe8935d589188ba5 100644
--- a/src/utils.cc
+++ b/src/utils.cc
@@ -168,6 +168,23 @@ int WriteCharsToFile(const char* str, int size, FILE* f) {
 }
 
 
+int AppendChars(const char* filename,
+                const char* str,
+                int size,
+                bool verbose) {
+  FILE* f = OS::FOpen(filename, "ab");
+  if (f == NULL) {
+    if (verbose) {
+      OS::PrintError("Cannot open file %s for writing.\n", filename);
+    }
+    return 0;
+  }
+  int written = WriteCharsToFile(str, size, f);
+  fclose(f);
+  return written;
+}
+
+
 int WriteChars(const char* filename,
                const char* str,
                int size,
@@ -214,11 +231,16 @@ void StringBuilder::AddSubstring(const char* s, int n) {
 
 
 void StringBuilder::AddFormatted(const char* format, ...) {
+  va_list arguments;
+  va_start(arguments, format);
+  AddFormattedList(format, arguments);
+  va_end(arguments);
+}
+
+
+void StringBuilder::AddFormattedList(const char* format, va_list list) {
   ASSERT(!is_finalized() && position_ < buffer_.length());
-  va_list args;
-  va_start(args, format);
-  int n = OS::VSNPrintF(buffer_ + position_, format, args);
-  va_end(args);
+  int n = OS::VSNPrintF(buffer_ + position_, format, list);
   if (n < 0 || n >= (buffer_.length() - position_)) {
     position_ = buffer_.length();
   } else {