WTF_VECTOR_INITIAL_SIZE properly defaults to 4 in wtf/Vector.h. No need to overrule the WTF_VECTOR_INITIAL_SIZE macro in the global gyp configuration file any more.

BUG=285442

Review URL: https://chromiumcodereview.appspot.com/24246013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224573 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224573