Fix path to KURL.h in FileMetadata.h.
Fix path to KURL.h in FileMetadata.h.

KURL.h has moved to platform/weborigin/.

BUG=

Review URL: https://codereview.chromium.org/111053002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@163500 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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