push-to-trunk.sh/merge-to-branch.sh: use "git apply" instead of "patch" to apply patches

tools/push-to-trunk.sh

 #!/bin/bash
 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
@@ skipping 250 matching lines @@
   echo ">>> Step $CURRENT_STEP: Create a new branch from trunk."
   git checkout -b $TRUNKBRANCH svn/trunk \
     || die "Checking out a new branch '$TRUNKBRANCH' failed."
 fi
 
 let CURRENT_STEP+=1
 if [ $START_STEP -le $CURRENT_STEP ] ; then
   echo ">>> Step $CURRENT_STEP: Apply squashed changes."
   rm -f "$TOUCHED_FILES_FILE"
   apply_patch "$PATCH_FILE"
-  stage_files
   rm -f "$PATCH_FILE"
 fi
 
 let CURRENT_STEP+=1
 if [ $START_STEP -le $CURRENT_STEP ] ; then
   echo ">>> Step $CURRENT_STEP: Set correct version for trunk."
   restore_version_if_unset
   sed -e "/#define MAJOR_VERSION/s/[0-9]*$/$MAJOR/" \
       -e "/#define MINOR_VERSION/s/[0-9]*$/$MINOR/" \
       -e "/#define BUILD_NUMBER/s/[0-9]*$/$BUILD/" \
@@ skipping 121 matching lines @@
 update the v8rel spreadsheet:"
   else
     echo "Congratulations, you have successfully created the trunk revision \
 $MAJOR.$MINOR.$BUILD. Please don't forget to roll this new version into \
 Chromium, and to update the v8rel spreadsheet:"
   fi
   echo -e "$MAJOR.$MINOR.$BUILD\ttrunk\t$TRUNK_REVISION"
   common_cleanup
   [[ "$TRUNKBRANCH" != "$CURRENT_BRANCH" ]] && git branch -D $TRUNKBRANCH
 fi