Update repo to use dart2js from pkg/compiler.

sdk/bin/dart2js

Index: sdk/bin/dart2js
diff --git a/sdk/bin/dart2js b/sdk/bin/dart2js
index 79a857be83efe500109c4f7c760fa2a9c008f2f9..4fe517fbbb65e9193adf205f78cd389d4d5d8255 100755
--- a/sdk/bin/dart2js
+++ b/sdk/bin/dart2js
@@ -20,13 +20,8 @@ BIN_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
 
 SDK_DIR="$(cd "${BIN_DIR}/.." ; pwd -P)"
 
-DART2JS="$SDK_DIR/lib/_internal/compiler/implementation/dart2js.dart"
-
 DART="$BIN_DIR/dart"
 
-SNAPSHOT_DIR="$BIN_DIR/snapshots"
-SNAPSHOT="$SNAPSHOT_DIR/dart2js.dart.snapshot"
-
 unset EXTRA_OPTIONS
 declare -a EXTRA_OPTIONS
 
@@ -41,10 +36,6 @@ fi
 unset EXTRA_VM_OPTIONS
 declare -a EXTRA_VM_OPTIONS
 
-if test -f "$SNAPSHOT"; then
-  EXTRA_OPTIONS+=("--library-root=$SDK_DIR")
-fi
-
 # Tell the VM to grow the heap more aggressively. This should only
 # be necessary temporarily until the VM is better at detecting how
 # applications use memory.
@@ -63,8 +54,21 @@ if [[ $DART_VM_OPTIONS ]]; then
   EXTRA_VM_OPTIONS+=("${OPTIONS[@]}")
 fi
 
-if test -f "$SNAPSHOT"; then
-  exec "$DART" "${EXTRA_VM_OPTIONS[@]}" "$SNAPSHOT" "${EXTRA_OPTIONS[@]}" "$@"
+DART_ROOT="$(cd "${SDK_DIR}/.." ; pwd -P)"
+
+DART2JS="$DART_ROOT/pkg/compiler/lib/src/dart2js.dart"
+
+if [ -z "$DART_CONFIGURATION" ];
+then
+  DART_CONFIGURATION="ReleaseIA32"
+fi
+
+if [[ `uname` == 'Darwin' ]]; then
+  BUILD_DIR="$DART_ROOT/xcodebuild/$DART_CONFIGURATION"
 else
-  exec "$DART" "${EXTRA_VM_OPTIONS[@]}" "$DART2JS" "${EXTRA_OPTIONS[@]}" "$@"
+  BUILD_DIR="$DART_ROOT/out/$DART_CONFIGURATION"
 fi
+
+PACKAGE_ROOT="$BUILD_DIR/packages/"
+
+exec "$DART" "${EXTRA_VM_OPTIONS[@]}" "--package-root=$PACKAGE_ROOT" "$DART2JS" "${EXTRA_OPTIONS[@]}" "$@"