diff --git a/runtime/third_party/double-conversion/AUTHORS b/runtime/third_party/double-conversion/AUTHORS
index 3637e6cd3c9..8a170b5072f 100644
--- a/runtime/third_party/double-conversion/AUTHORS
+++ b/runtime/third_party/double-conversion/AUTHORS
@@ -7,3 +7,4 @@
 Google Inc.
 
 Jeff Muizelaar <jmuizelaar@mozilla.com>
+Martin Olsson <mnemo@minimum.se>
diff --git a/runtime/third_party/double-conversion/README.dart b/runtime/third_party/double-conversion/README.dart
index 5871e386826..347418baad4 100644
--- a/runtime/third_party/double-conversion/README.dart
+++ b/runtime/third_party/double-conversion/README.dart
@@ -1,5 +1,5 @@
 URL: http://code.google.com/p/double-conversion/
-Version: d7a1ee5a309c ('Merge in "Reduce static" branch.').
+Version: c8b89fb5c5b4 ('Merge in branch unused.').
 License: BSD
 License File: LICENSE
 
@@ -9,5 +9,3 @@ for v8.
 
 Local Modifications:
 Removed the test directory, the Makefile and the scons-files.
-Wrapped ASSERT, UNIMPLEMENTED and UNREACHABLE macros into #ifndef.
-Changed memcpy to memmove.
diff --git a/runtime/third_party/double-conversion/src/double-conversion.cc b/runtime/third_party/double-conversion/src/double-conversion.cc
index 944ddf798ea..efc1341db2d 100644
--- a/runtime/third_party/double-conversion/src/double-conversion.cc
+++ b/runtime/third_party/double-conversion/src/double-conversion.cc
@@ -604,7 +604,6 @@ double StringToDoubleConverter::StringToDouble(
   int significant_digits = 0;
   int insignificant_digits = 0;
   bool nonzero_digit_dropped = false;
-  bool fractional_part = false;
 
   bool sign = false;
 
@@ -748,10 +747,8 @@ double StringToDoubleConverter::StringToDouble(
       }
     }
 
-    // We don't emit a '.', but adjust the exponent instead.
-    fractional_part = true;
-
     // There is a fractional part.
+    // We don't emit a '.', but adjust the exponent instead.
     while (*current >= '0' && *current <= '9') {
       if (significant_digits < kMaxSignificantDigits) {
         ASSERT(buffer_pos < kBufferSize);