chromiumer.sh bash script that will download the latest Chromium chrome-mac.zip and devtools_frontend.zip, extract them into cwd, and link them together using --debug-devtools-frontend.

chromiumer-devtools.sh

#!/bin/bash

# I use this (optional) file to make the font larger for presentations - Cowboy

echo -n "Modifying fonts..."
find "$1" \( -name devTools.css \) \
-exec sh -c 'cat >> $1 <<EOF

/* Added on `date` */
body.platform-mac.platform-mac-snowleopard .monospace,
body.platform-mac.platform-mac-snowleopard .source-code {
  font-size: 18px !important;
  font-family: monaco, monospace;
}

body.platform-linux .monospace, body.platform-linux .source-code {
  font-size: 18px !important;
  font-family: dejavu sans mono, monospace;
}
EOF' _ {} \;
echo "OK"

chromiumer.sh

#!/bin/bash

OS="Mac"
URLBASE="http://commondatastorage.googleapis.com/chromium-browser-continuous/$OS"
APP="chrome-mac.zip"
DEV="devtools_frontend.zip"
REV=$1

INSTALLPATH="."

CURRENT=$(cat "$INSTALLPATH/chromium/REVISION" 2>/dev/null)

if [ ! "$REV" ]; then
  echo -n "Checking latest Chromium version..."
  REV=$(curl -s "$URLBASE/LAST_CHANGE")
  if [[ "$REV" =~ ^[0-9]+$ ]]; then
    echo "OK"
  else
    echo "ERROR"
    echo "Error loading revision data from $URLBASE/LAST_CHANGE, aborting update."
    exit 1
  fi
fi

echo "Attempting to update Chromium to revision $REV..."

if [ "$REV" = "$CURRENT" ]; then
  if [ "$1" ]; then
    echo "Revision $REV is already installed!"
  else
    echo "Already up-to-date!"
  fi
  exit 1
fi

TMP=$(mktemp -d "/tmp/chromiumer.XXXXX")
curl "$URLBASE/$REV/{$APP,$DEV}" --progress-bar --location --output "$TMP/#1"

if [ ! -f "$TMP/$APP" ]; then
  echo "Error downloading $APP, aborting update."
  rm -rf "$TMP"
  exit 1
fi

if [ ! -f "$TMP/$DEV" ]; then
  echo "Error downloading $DEV, aborting update."
  rm -rf "$TMP"
  exit 1
fi

echo -n "Deleting existing files..."
rm -rf "$INSTALLPATH/Chromium.app" "$INSTALLPATH/chromium"
echo "OK"

echo -n "Creating new files..."
mkdir -p "$INSTALLPATH/chromium"
DEVTOOLS="$INSTALLPATH/chromium/devtools"
echo $REV > "$INSTALLPATH/chromium/REVISION"
unzip -qo "$TMP/$DEV" -d "$DEVTOOLS"
unzip -qo "$TMP/$APP" -d "$TMP"
echo "OK"

APPBASE=$(basename "$APP" .zip)
mv "$TMP/$APPBASE/Chromium.app" "$INSTALLPATH/"

echo -n "Modifying Chromium bin file to use --debug-devtools-frontend..."
BINPATH="$INSTALLPATH/Chromium.app/Contents/MacOS"
BIN="$BINPATH/Chromium"
mv "$BIN" "$BINPATH/Chromium-bin"

cat > "$BIN" <<'EOF'
#!/bin/bash
BIN=$(echo $0 | perl -pe 's/$/-bin/')
DEV=$(echo $0 | perl -pe 's#Chromium\.app.*#chromium/devtools#')
"$BIN" --debug-devtools-frontend="$DEV"
EOF
chmod +x "$BIN"
echo "OK"

echo -n "Cleaning up..."
rm -rf "$TMP"
echo "OK"

if [ -f "chromiumer-devtools.sh" ]; then
  echo "Running chromiumer-devtools.sh..."
  ./chromiumer-devtools.sh "$DEVTOOLS"
fi

echo "Done!"