Add mb config for CrWinClang64(dbg).

testing/buildbot/chromium.fyi.json

 {
   "Browser Side Navigation Linux": {
     "gtest_tests": [
       {
         "args": [
           "--enable-browser-side-navigation",
           "--gtest_filter=-CrossSiteRedirectorBrowserTest.VerifyCrossSiteRedirectURL:CrossSiteTransferTest.NoLeakOnCrossSiteCancel:CrossSiteTransferTest.ReplaceEntryCrossProcessThenTransfer:CrossSiteTransferTest.ReplaceEntryCrossProcessTwice:CrossSiteTransferTest.ReplaceEntryInProcessThenTranfers:DatabaseTest.ReloadPage:NavigationControllerBrowserTest.CorrectLengthWithCurrentItemReplacement:NavigationControllerBrowserTest.FrameNavigationEntry_BlankAutoSubframe:NavigationControllerBrowserTest.NavigationTypeClassification_ClientSideRedirect:NavigationControllerBrowserTest.NavigationTypeClassification_ExistingPage:NavigationControllerBrowserTest.NavigationTypeClassification_InPage:NavigationControllerBrowserTest.NavigationTypeClassification_NewAndAutoSubframe:NavigationControllerBrowserTest.NavigationTypeClassification_NewPage:NavigationControllerBrowserTest.PreventSpoofFromSubframeAndReplace:NavigationControllerBrowserTest.StopCausesFailureDespiteJavaScriptURL:NavigationControllerBrowserTest.SubframeBackFromReplaceState:RFHMProcessPerTabTest.BackFromWebUI:RenderFrameHostManagerTest.BackForwardNotStale:RenderFrameHostManagerTest.DisownOpener:RenderFrameHostManagerTest.RestoreFileAccessForHistoryNavigation:RenderFrameHostManagerTest.RestoreSubframeFileAccessForHistoryNavigation:RenderFrameHostManagerTest.SwappedOutViewHasCorrectVisibilityState:RenderViewImplTest.DecideNavigationPolicy:RenderViewImplTest.NavigationStartOverride:RenderViewImplTest.OnNavigationHttpPost:RenderViewImplTest.ReloadWhileSwappedOut:RenderViewImplTest.StaleNavigationsIgnored:RenderViewImplTest.TestBackForward:SecurityExploitBrowserTest.AttemptDuplicateRenderViewHost:SecurityExploitBrowserTest.AttemptDuplicateRenderWidgetHost:SecurityExploitBrowserTest.InterstitialCommandFromUnderlyingContent:ServiceWorkerBrowserTest.CrossSiteTransfer:ServiceWorkerBrowserTest.ImportsBustMemcache:ServiceWorkerBrowserTest.Reload:ServiceWorkerBrowserTest.ResponseFromHTTPServiceWorkerIsNotMarkedAsSecure:ServiceWorkerBrowserTest.ResponseFromHTTPSServiceWorkerIsMarkedAsSecure:SessionHistoryTest.BasicBackForward:SessionHistoryTest.CrossFrameFormBackForward:SessionHistoryTest.FragmentBackForward:SessionHistoryTest.FrameBackForward:SessionHistoryTest.FrameFormBackForward:SessionHistoryTest.HistoryLength:SessionHistoryTest.JavascriptHistory:SessionHistoryTest.LocationChangeInSubframe:SitePerProcessBrowserTest.CrossSiteDidStopLoading:WebContentsImplBrowserTest.ClearNonVisiblePendingOnFail:WebContentsViewAuraTest.OverscrollScreenshot:WebContentsViewAuraTest.ReplaceStateReloadPushState:WebRtcBrowserTest.CallInsideIframe:WebUIMojoTest.EndToEndPing"
         ],
         "test": "content_browsertests"
       },
@@ skipping 2348 matching lines @@
         "test": "views_unittests"
       }
     ]
   },
   "CrWinClang64(dbg) tester": {
     "gtest_tests": [
       {
         "test": "angle_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "base_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true,
-          "shards": 10
-        },
         "test": "browser_tests"
       },
       {
         "test": "cacheinvalidation_unittests"
       },
       {
         "test": "chrome_elf_unittests"
       },
       {
         "test": "components_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "content_browsertests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "content_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "courgette_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "crypto_unittests"
       },
       {
         "test": "device_unittests"
       },
       {
         "test": "extensions_unittests"
       },
       {
         "test": "gcm_unit_tests"
@@ skipping 13 matching lines @@
       {
         "test": "jingle_unittests"
       },
       {
         "test": "media_unittests"
       },
       {
         "test": "midi_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "net_unittests"
       },
       {
         "test": "ppapi_unittests"
       },
       {
         "test": "printing_unittests"
       },
       {
         "test": "remoting_unittests"
@@ skipping 13 matching lines @@
       {
         "test": "sql_unittests"
       },
       {
         "test": "sync_unit_tests"
       },
       {
         "test": "ui_base_unittests"
       },
       {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "unit_tests"
       },
       {
         "test": "url_unittests"
       },
       {
         "test": "views_unittests"
       }
     ]
   },
@@ skipping 1019 matching lines @@
       },
       {
         "args": [
           "--site-per-process"
         ],
         "test": "unit_tests"
       }
     ]
   }
 }