Switch dartfmt in the SDK to run dart_style.

sdk/bin/dartfmt

 #!/bin/bash
 # Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
-# Run dartfmt.dart on the Dart VM. This script assumes the Dart SDK's directory
-# structure.
+# Run dart_style/bin/format.dart on the Dart VM. This script assumes the Dart
+# repo's directory structure.
 
 function follow_links() {
   file="$1"
   while [ -h "$file" ]; do
     # On Mac OS, readlink -f doesn't work.
     file="$(readlink "$file")"
   done
   echo "$file"
 }
 
 # Unlike $0, $BASH_SOURCE points to the absolute path of this file.
 PROG_NAME="$(follow_links "$BASH_SOURCE")"
 
 # Handle the case where dart-sdk/bin has been symlinked to.
 BIN_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
-
 SDK_DIR="$(cd "${BIN_DIR}/.." ; pwd -P)"
 
-SNAPSHOT="$BIN_DIR/snapshots/dartfmt.dart.snapshot"
+DART="$BIN_DIR/dart"
 
-if test -f "$SNAPSHOT"; then
-  # We are running the snapshot in the built SDK.
-  DART="$BIN_DIR/dart"
-  exec "$DART" "$SNAPSHOT" "$@"
+DART_ROOT="$(cd "${SDK_DIR}/.." ; pwd -P)"
+
+DARTFMT="$DART_ROOT/third_party/pkg/dart_style/bin/format.dart"
+
+if [ -z "$DART_CONFIGURATION" ];
+then
+  DART_CONFIGURATION="ReleaseIA32"
+fi
+
+if [[ `uname` == 'Darwin' ]]; then
+  BUILD_DIR="$DART_ROOT/xcodebuild/$DART_CONFIGURATION"
 else
-  # We are running dartfmt from source in the development repo.
-  if [ -z "$DART_CONFIGURATION" ];
-  then
-    DART_CONFIGURATION="ReleaseIA32"
-  fi
+  BUILD_DIR="$DART_ROOT/out/$DART_CONFIGURATION"
+fi
 
-  # TODO(pquitslund): this bit seems wrong, but was cribbed verbatim from pub
-  # Need to revisit and fix
-  if [[ `uname` == 'Darwin' ]];
-  then
-    BUILD_DIR="$SDK_DIR/../xcodebuild/$DART_CONFIGURATION"
-  else
-    BUILD_DIR="$SDK_DIR/../out/$DART_CONFIGURATION"
-  fi
+PACKAGE_ROOT="$BUILD_DIR/packages/"
 
-  DART="$BUILD_DIR/dart-sdk/bin/dart"
-  PKG_DIR="$BUILD_DIR/packages"
-  DARTFMT="$SDK_DIR/../pkg/analyzer/bin/formatter.dart"
-
-  exec "$DART" "--package-root=$PKG_DIR" "$DARTFMT" "$@"
-fi
+exec "$DART" "--package-root=$PACKAGE_ROOT" "$DARTFMT" "$@"