rebaseline.py: in option names, replace underscores with hyphens

tools/tests/run.sh

 #!/bin/bash
 
 # Tests for our tools.
 #
 # TODO: currently, this only passes on Linux (which is the platform that
 # the housekeeper bot runs on, e.g.
 # http://70.32.156.51:10117/builders/Skia_PerCommit_House_Keeping/builds/1415/steps/RunToolSelfTests/logs/stdio )
 # See https://code.google.com/p/skia/issues/detail?id=677
 # ('make tools/tests/run.sh work cross-platform')
 # Ideally, these tests should pass on all development platforms...
@@ skipping 111 matching lines @@
   $COMMAND &>$ACTUAL_OUTPUT_DIR/stdout
   echo $? >$ACTUAL_OUTPUT_DIR/return_value
   END_TIMESTAMP=$(date +%s)
 
   SECONDS_RUN=$(expr $END_TIMESTAMP - $START_TIMESTAMP)
   echo "bench_graph_svg.py for $PLATFORM took $SECONDS_RUN seconds to complete"
 
   compare_directories $EXPECTED_OUTPUT_DIR $ACTUAL_OUTPUT_DIR
 }
 
-# Run rebaseline.py with arguments in $1, recording its dry_run output.
-# Then compare that dry_run output to the content of $2/output-expected.
+# Run rebaseline.py with arguments in $1, recording its dry-run output.
+# Then compare that dry-run output to the content of $2/output-expected.
 function rebaseline_test {
   if [ $# != 2 ]; then
     echo "rebaseline_test requires exactly 2 parameters, got $#"
     exit 1
   fi
   ARGS="$1"
   ACTUAL_OUTPUT_DIR="$2/output-actual"
   EXPECTED_OUTPUT_DIR="$2/output-expected"
 
   rm -rf $ACTUAL_OUTPUT_DIR
   mkdir -p $ACTUAL_OUTPUT_DIR
-  COMMAND="python tools/rebaseline.py --dry_run $ARGS"
+  COMMAND="python tools/rebaseline.py --dry-run $ARGS"
   echo "$COMMAND" >$ACTUAL_OUTPUT_DIR/command_line
   $COMMAND &>$ACTUAL_OUTPUT_DIR/stdout
   echo $? >$ACTUAL_OUTPUT_DIR/return_value
 
   compare_directories $EXPECTED_OUTPUT_DIR $ACTUAL_OUTPUT_DIR
 }
 
 
 
 #
@@ skipping 48 matching lines @@
 fi
 
 #
 # Test rebaseline.py ...
 #
 
 REBASELINE_INPUT=tools/tests/rebaseline/input
 REBASELINE_OUTPUT=tools/tests/rebaseline/output
 rebaseline_test "--tests test1 test2 --configs 565 8888 --subdirs base-android-galaxy-nexus base-shuttle-win7-intel-float" "$REBASELINE_OUTPUT/subset"
 rebaseline_test "--tests test1 test2" "$REBASELINE_OUTPUT/all"
-rebaseline_test "--json_base_url file:$REBASELINE_INPUT/json1 --subdirs base-android-galaxy-nexus base-shuttle-win7-intel-float" "$REBASELINE_OUTPUT/using-json1"
+rebaseline_test "--json-base-url file:$REBASELINE_INPUT/json1 --subdirs base-android-galaxy-nexus base-shuttle-win7-intel-float" "$REBASELINE_OUTPUT/using-json1"
 
 echo "All tests passed."