Disable SitePerProcessBrowserTest.RFPHDestruction on viz

Failing runs on Linux Tests:
https://ci.chromium.org/buildbot/chromium.linux/Linux%20Tests/65554
https://ci.chromium.org/buildbot/chromium.linux/Linux%20Tests/65557

BUG=792739
R=jonross@chromium.org

Change-Id: I7e1c151f5eaa108c4416a681d22d26884493ec6a
Reviewed-on: https://chromium-review.googlesource.com/826462
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Reviewed-by: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524069}

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

@@ -86,11 +86,10 @@
 # TODO: investigate flaky failure http://crbug.com/790683
 -SitePerProcessBrowserTest.CrossSiteIframeBlockedByXFrameOptionsOrCSP
 
-# TODO: investigate flaky failure http://crbug.com/792739
+# TODO: investigate flaky failures http://crbug.com/792739
 -SitePerProcessFeaturePolicyBrowserTest.TestFeaturePolicyReplicationFromRemoteFrames
-
-# TODO: investigate flaky failure http://crbug.com/792740
 -IsolatedOriginTest.ProcessLimit
+-SitePerProcessBrowserTest.RFPHDestruction
 
 # Tests failures related to surface sync. http://crbug.com/793302
 -RenderWidgetHostViewBrowserTestBase.CompositorWorksWhenReusingRenderer

testing/buildbot/filters/viz.content_browsertests.filter

@@ -86,11 +86,10 @@
 # TODO: investigate flaky failure http://crbug.com/790683
 -SitePerProcessBrowserTest.CrossSiteIframeBlockedByXFrameOptionsOrCSP
 
-# TODO: investigate flaky failure http://crbug.com/792739
+# TODO: investigate flaky failures http://crbug.com/792739
 -SitePerProcessFeaturePolicyBrowserTest.TestFeaturePolicyReplicationFromRemoteFrames
-
-# TODO: investigate flaky failure http://crbug.com/792740
 -IsolatedOriginTest.ProcessLimit
+-SitePerProcessBrowserTest.RFPHDestruction
 
 # Tests failures related to surface sync. http://crbug.com/793302
 -RenderWidgetHostViewBrowserTestBase.CompositorWorksWhenReusingRenderer