PlzNavigate: Pass the encoded resource transfer size to the renderer.

third_party/WebKit/LayoutTests/FlagExpectations/enable-browser-side-navigation

 # These tests currently fail when run with --enable-browser-side-navigation
 # See https://crbug.com/576261
 # https://crbug.com/608372: PlzNavigate: support POST navigations
 crbug.com/608372 fast/forms/form-submit-in-submit-event.html [ Failure ]
 crbug.com/608372 fast/forms/submit-to-url-fragment.html [ Failure ]
 crbug.com/608372 fast/forms/xss-auditor-doesnt-crash-on-post-submit.html [ Timeout ]
 crbug.com/608372 fast/loader/form-state-restore-with-frames.html [ Failure ]
 crbug.com/608372 http/tests/history/back-to-post.html [ Timeout ]
 crbug.com/608372 http/tests/navigation/post-goback-same-url.html [ Failure ]
 crbug.com/608372 virtual/stable/http/tests/navigation/post-goback-same-url.html [ Failure ]
@@ skipping 135 matching lines @@
 crbug.com/648608 http/tests/cookies/same-site/popup-same-site.html [ Failure ]
 crbug.com/648608 virtual/mojo-loading/http/tests/cookies/same-site/popup-same-site-post.html [ Failure ]
 crbug.com/648608 virtual/mojo-loading/http/tests/cookies/same-site/popup-same-site.html [ Failure ]
 
 # https://crbug.com/673742 Calling document.open should cancel a load
 crbug.com/673742 fast/dom/Document/open-with-pending-load.html [ Failure ]
 
 # https://crbug.com/673744 Popups should open in the correct window
 crbug.com/673744 fast/dom/HTMLAnchorElement/anchor-no-multiple-windows.html [ Failure ]
 
-# https://crbug.com/673745 Resource transfer size should be forwarded to blink
-crbug.com/673745 http/tests/misc/resource-timing-sizes-tags.html [ Failure ]
-crbug.com/673745 virtual/mojo-loading/http/tests/misc/resource-timing-sizes-tags.html [ Failure ]
-
 # Timeout when receiving a 204 response
 # Note (clamy): I haven't filed a bug yet since
 # https://codereview.chromium.org/2549373004/ will modify 204 handling when it
 # lands.
 Bug(none) http/tests/navigation/response204.html [ Timeout ]
 Bug(none) virtual/stable/http/tests/navigation/response204.html [ Timeout ]
 Bug(none) virtual/mojo-loading/http/tests/navigation/response204.html [ Timeout ]
 
 # https://crbug.com/673748 Cross frame access should work
 crbug.com/673748 http/tests/security/cross-frame-access-parent-isolated-world.html [ Timeout ]
@@ skipping 11 matching lines @@
 Bug(none) imported/wpt/html/browsers/origin/cross-origin-objects/cross-origin-objects-exceptions.html [ Failure ]
 
 # https://crbug.com/673751 Policy delegate is called twice
 crbug.com/673751 http/tests/misc/policy-delegate-called-twice.html [ Failure ]
 crbug.com/673751 virtual/mojo-loading/http/tests/misc/policy-delegate-called-twice.html [ Failure ]
 
 # These tests are flaky.
 Bug(none) http/tests/misc/window-open-then-write.html [ Timeout ]
 Bug(none) imported/wpt/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-history-back.html [ Failure ]
 Bug(none) virtual/mojo-loading/http/tests/misc/window-open-then-write.html [ Timeout ]