Roll chromium to 8ea235
Roll chromium to 8ea235

Bring in two commits:
37b31e0 [Android] Backport Chromium r237215
cdb5fd4 [Android] Allow use non Activity context to create ContentVideoView

BUG=https://crosswalk-project.org/jira/browse/XWALK-458
    https://crosswalk-project.org/jira/browse/XWALK-171

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