viz: Try enabling tests tests on FYI.

These tests were failing because of a flag not being passed. Try
enabling on FYI.

TBR: jonross@chromium.org
Bug: 793302
Change-Id: Ic780a2545199c7c7d81014f3650c95de1b19f57c
Reviewed-on: https://chromium-review.googlesource.com/827027Reviewed-by: kylechar <kylechar@chromium.org>
Reviewed-by: Jonathan Ross <jonross@chromium.org>
Commit-Queue: kylechar <kylechar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524077}

testing/buildbot/filters/mojo.fyi.viz.content_browsertests.filter

@@ -92,19 +92,5 @@
 -SitePerProcessBrowserTest.RFPHDestruction
 
 # Tests failures related to surface sync. http://crbug.com/793302
--RenderWidgetHostViewBrowserTestBase.CompositorWorksWhenReusingRenderer
 -RenderWidgetInitialSizeTest.InitialSize
 -RenderWidgetTest.OnResize
--ScreenOrientationBrowserTest.ScreenOrientationChange
--ScreenOrientationBrowserTest.WindowOrientationChange
--ScreenOrientationOOPIFBrowserTest.ScreenOrientation
--ScreenOrientationOOPIFBrowserTest.ScreenOrientationInPendingMainFrame
--SitePerProcessBrowserTest.CommunicateWithProxyAfterCancelPending
--SitePerProcessBrowserTest.CrossProcessInertSubframe
--SitePerProcessBrowserTest.CrossSiteIframeDisplayNone
--SitePerProcessBrowserTest.FileChooserInSubframe
--SitePerProcessBrowserTest.MainframeTouchEventRouting
--SitePerProcessBrowserTest.RecreateMainFrameAfterCancelPending
--SitePerProcessBrowserTest.ReuseNonLiveRenderViewHostAfterCancelPending
--WheelScrollLatchingBrowserTest.WheelEventTarget
--WheelScrollLatchingDisabledBrowserTest.WheelEventTarget