Make sure that chrome/ dir exists for webkit_unit_tests on Android.
Make sure that chrome/ dir exists for webkit_unit_tests on Android.

webkit_support::GetWebKitRootDirFilePath() looks for a chrome/ directory so
that it can identify this as a chrome working directory and therefore add
third_party/WebKit to the path to get the WebKit root dir. This normally
works because other unit tests pull in the chrome directory for their own
reasons, but if this is the first test run on a blank /data/local/tmp
directory, webkit_unit_test fails when it tries to load resources required
for the tests.

Pull in chrome/VERSION and thus ensure that the chrome/ directory exists.

TEST=webkit_unit_tests


Review URL: http://codereview.chromium.org/9433049

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@123312 0039d316-1c4b-4281-b951-d872f2087c98

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