build.py will not accept --arch=dartc soon, so removing references and uses of --arch=dartc in th...

compiler/scripts/compiler_compare.sh

 #!/bin/bash
 #
 # Copyright (c) 2011, 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.
 
 # Compare the current working copy of the repository to either a clean copy
 # or the specified revision.
 # Along with the files created by compiler_metrics.sh, creates
 # compiler_compare[_stats_[12]].log in the working direcetory and a
@@ skipping 135 matching lines @@
 
 # zero out files
 echo "" > $LOG_FILE
 echo "" > $STAT1
 echo "" > $STAT2
 
 # Do the first test
 echo "Compiling dartc with your changes (mode=release)"
 cd $ROOT_OF_REPO/compiler
 gclient runhooks >> $LOG_FILE 2>&1
-../tools/build.py --mode release --arch dartc >> $LOG_FILE 2>&1
+../tools/build.py --mode release >> $LOG_FILE 2>&1
 failTest $? "Error compiling your location changes, check $LOG_FILE"
 
 echo "Running first test against current working copy"
 echo $SCRIPT_PATH/compiler_metrics.sh --stats-prefix=yours --dartc=./out/Release_dartc/dartc $COMPARE_OPTIONS --app=$APP >> $LOG_FILE
 $SCRIPT_PATH/compiler_metrics.sh --stats-prefix=yours --dartc=./out/Release_dartc/dartc $COMPARE_OPTIONS --app=$APP > $STAT1
 failTest $? "Error collecting statistics from working copy"
 
 # switch to tmp for remainder of building
 cd $TMP_DIR
 
 gclient config https://dart.googlecode.com/svn/branches/bleeding_edge/deps/compiler.deps >> $LOG_FILE 2>&1
 failTest $? "Error calling gclient config"
 
 GCLIENT_SYNC="-t "
 if [ "" != "$REV" ]; then
   GCLIENT_SYNC+="--revision=$REV"
 fi
 
 echo "Checking out clean version of $REV; will take some time. Look at $LOG_FILE for progress"
 gclient sync $GCLIENT_SYNC  >> $LOG_FILE 2>&1
 failTest $? "Error calling gclient sync"
 
 echo "Compiler clean version; may take some time"
 cd compiler
 gclient runhooks >> $LOG_FILE 2>&1
-../tools/build.py --mode release --arch dartc >> $LOG_FILE 2>&1
+../tools/build.py --mode release >> $LOG_FILE 2>&1
 failTest $? "Error compiling comparison revision"
 
 # Do the second test
 echo "Running second test against clean copy"
 echo $SCRIPT_PATH/compiler_metrics.sh --stats-prefix=clean --dartc=./out/Release_dartc/dartc $COMPARE_OPTIONS --app=$APP >> $LOG_FILE
 $SCRIPT_PATH/compiler_metrics.sh --stats-prefix=clean --dartc=./out/Release_dartc/dartc $COMPARE_OPTIONS --app=$APP > $STAT2
 failTest $? "Error collecting statistics from clean copy"
 
 calcStats