Add tests to viz_content_browsertests on FYI trybot.

Some OOPIF problems have been fixed when running content_browsertests
with --enable-viz. Add passing tests back to FYI trybot to check for
flaky tests.

TBR: sky@chromium.org
Bug: 762510
Change-Id: I1e284daff7f46e05a3c7ecc447d16510ebef50b1
Reviewed-on: https://chromium-review.googlesource.com/775975Reviewed-by: kylechar <kylechar@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: kylechar <kylechar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#517408}

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

@@ -23,24 +23,7 @@
 -WebRtcCaptureFromElementBrowserTest.CaptureFromOpaqueCanvas2DHandlesContextLoss
 
 # OOPIFs aren't supported yet http://crbug.com/778751
--CrossProcessFrameTreeBrowserTest.*
--CrossSiteResourceHandlerTest.*
--DownloadContentTest.DownloadAttributeCrossOriginIFrame
--DownloadContentTest.DownloadIgnoresXFO
--DumpAccessibilityTreeTest.AccessibilityIframeCoordinatesCrossProcess
--DumpAccessibilityTreeTest.AccessibilityIframeCrossProcess
--DumpAccessibilityTreeTest.AccessibilityIframeTransformCrossProcess
--DumpAccessibilityTreeTest.AccessibilityIframeTransformNested
--DumpAccessibilityTreeTest.AccessibilityIframeTransformNestedCrossProcess
--FindRequestManagerTests/FindRequestManagerTest.*
--IsolateIcelandFrameTreeBrowserTest.ProcessSwitchForIsolatedBlob
--IsolatedDevToolsProtocolTest.ControlNavigationsChildFrames
--IsolatedOriginTest.*
--MHTMLGenerationSitePerProcessTest.GenerateMHTML
 -PointerLockBrowserTest.*
--RenderWidgetHostViewChildFrameTest.*
--RequestDelayingSitePerProcessBrowserTest.*
--ScreenOrientationOOPIFBrowserTest.*
 -SecurityExploitBrowserTest.PageStateToWrongEntry
 -SitePerProcessAccessibilityBrowserTest.*
 -SitePerProcessBrowserTest.*
@@ -53,10 +36,7 @@
 -SitePerProcessHighDPIBrowserTest.*
 -SitePerProcessIgnoreCertErrorsBrowserTest.*
 -SitePerProcessMouseWheelBrowserTest.*
--TopDocumentIsolationTest.*
 -TouchSelectionForCrossProcessFramesTests/TouchSelectionControllerClientAuraSiteIsolationTest.*
--WakeLockTest.OutOfProcessFrame
--WakeLockTest.UnlockAfterCrashOutOfProcessFrame
 
 # Copy Surface timing out http://crbug.com/785257
 -GLAndSoftwareCompositing/CompositingRenderWidgetHostViewBrowserTest.*