Remove incorrect dependency of webdata component on //content.
Remove incorrect dependency of webdata component on //content.

According to README in components/webdata, this component is not
allowed to depends on //content (and in fact does not depends on
//content at all) so remove the incorrect dependency in the gypi
file.

BUG=547724

Review URL: https://codereview.chromium.org/1658243002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#373212}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk