Fix build breakage caused by r158725.
Fix build breakage caused by r158725.

Remove out-of-date reference to FloatConversion.h

TBR=leviw@chromium.org
BUG=

Review URL: https://codereview.chromium.org/25741003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@158729 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