Skip the Chromium tarball when syncing for the first time

It's no faster than just syncing straight from Subversion for me.

script/update

@@ -17,25 +17,8 @@ source VERSION
 
 export PATH="${VENDOR_DIR}/depot_tools:${PATH}"
 
-if [ ! -d "${CHROMIUM_DIR}" ]; then
-  mkdir -p "$(dirname "${CHROMIUM_DIR}")"
-
-  CHROMIUM_TARBALL_BASE_URL="http://chromium-browser-source.commondatastorage.googleapis.com/"
-  CHROMIUM_TARBALL_FILENAME=$(curl --silent "${CHROMIUM_TARBALL_BASE_URL}chromium_tarball.html" | grep 'href=' | sed -E -e 's/.*href="([^"]+)".*/\1/')
-
-  TEMP_DIR=$(mktemp -d -t prebuilt-chromium-bootstrap)
-  trap "rm -rf \"${TEMP_DIR}\"" EXIT
-
-  announce "Downloading Chromium tarball..."
-  curl "${CHROMIUM_TARBALL_BASE_URL}${CHROMIUM_TARBALL_FILENAME}" | tar -xz -C "${TEMP_DIR}"
-  mv "${TEMP_DIR}/home/src_tarball/tarball/chromium" "${CHROMIUM_DIR}"
-
-  cd "${CHROMIUM_DIR}/src"
-  gclient sync --force --revision src@${CHROMIUM_REVISION}
-else
-  cd "${CHROMIUM_DIR}/src"
-  gclient sync --revision src@${CHROMIUM_REVISION}
-fi
+cd "${CHROMIUM_DIR}"
+gclient sync --revision src@${CHROMIUM_REVISION}
 
 export GYP_GENERATORS=ninja
 cd "${SOURCE_ROOT}"

vendor/.gitignore

@@ -1 +0,0 @@
-/chromium/

vendor/chromium/.gclient

@@ -0,0 +1,24 @@
+# An element of this array (a "solution") describes a repository directory
+# that will be checked out into your working copy.  Each solution may
+# optionally define additional dependencies (via its DEPS file) to be
+# checked out alongside the solution's directory.  A solution may also
+# specify custom dependencies (via the "custom_deps" property) that
+# override or augment the dependencies specified by the DEPS file.
+solutions = [
+  { "name"        : "src",
+    "url"         : "http://src.chromium.org/svn/trunk/src",
+    "custom_deps" : {
+      # To use the trunk of a component instead of what's in DEPS:
+      #"component": "https://svnserver/component/trunk/",
+      # To exclude a component from your working copy:
+      #"data/really_large_component": None,
+      "src/third_party/WebKit/LayoutTests": None,
+      "src/chrome_frame/tools/test/reference_build/chrome_win": None,
+      "src/chrome/test/data/perf/canvas_bench": None,
+      "src/chrome/test/data/perf/frame_rate/content": None,
+      "src/chrome/tools/test/reference_build/chrome_mac": None,
+      "src/chrome/tools/test/reference_build/chrome_win": None,
+      "src/chrome/tools/test/reference_build/chrome_linux": None,
+    }
+  }
+]

vendor/chromium/.gitignore

@@ -0,0 +1,2 @@
+/src/
+/.gclient_entries