This will fix
-WebViewTests/WebViewTest.Shim_TestLoadStartLoadRedirect/0
-WebViewTests/WebViewTest.Shim_TestLoadStartLoadRedirect/1

and partially
-WebViewTests/WebViewTest.Shim_TestWebRequestAPIWithHeaders/0
-WebViewTests/WebViewTest.Shim_TestWebRequestAPIWithHeaders/1
(which also depend on web request API)

also
WebViewAPITest.TestWebRequestAPIWithHeaders
WebViewAPITest.TestLoadStartLoadRedirect

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/144e7724a1b8c58e51e556c8fdf55ccaac26d2f1

commit 144e7724a1b8c58e51e556c8fdf55ccaac26d2f1
Author: John Abd-El-Malek <jam@chromium.org>
Date: Wed Nov 22 21:12:40 2017

Stop using deprecated WebContentsObserver::DidGetRedirectForResourceRequest in webview code.

This will go away in favor of DidRedirectNavigation, since the former doesn't work with network service.

BUG= 787891 

Change-Id: I3c872f36f870e3ebb71eebc496f400980637ffe9
Reviewed-on: https://chromium-review.googlesource.com/786396
Reviewed-by: Fady Samuel <fsamuel@chromium.org>
Commit-Queue: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#518747}
[modify] https://crrev.com/144e7724a1b8c58e51e556c8fdf55ccaac26d2f1/extensions/browser/guest_view/web_view/web_view_guest.cc
[modify] https://crrev.com/144e7724a1b8c58e51e556c8fdf55ccaac26d2f1/extensions/browser/guest_view/web_view/web_view_guest.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/cb599d07711b26abf0abef5b5fd1589d8fcfbe16

commit cb599d07711b26abf0abef5b5fd1589d8fcfbe16
Author: John Abd-El-Malek <jam@chromium.org>
Date: Wed Nov 22 21:36:00 2017

Stop using deprecated WebContentsObserver::DidGetRedirectForResourceRequest in prerender code.

This will go away in favor of DidRedirectNavigation, since the former doesn't work with network service.

BUG= 787891 

Change-Id: I019001b77fe694c835d6348830309f917152e6d7
Reviewed-on: https://chromium-review.googlesource.com/786394
Reviewed-by: Matt Menke <mmenke@chromium.org>
Commit-Queue: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#518756}
[modify] https://crrev.com/cb599d07711b26abf0abef5b5fd1589d8fcfbe16/chrome/browser/prerender/prerender_contents.cc
[modify] https://crrev.com/cb599d07711b26abf0abef5b5fd1589d8fcfbe16/chrome/browser/prerender/prerender_contents.h
[modify] https://crrev.com/cb599d07711b26abf0abef5b5fd1589d8fcfbe16/chrome/browser/prerender/prerender_tab_helper.cc
[modify] https://crrev.com/cb599d07711b26abf0abef5b5fd1589d8fcfbe16/chrome/browser/prerender/prerender_tab_helper.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b0d81669d862749d7ae369bdd390a64fa2cfdc17

commit b0d81669d862749d7ae369bdd390a64fa2cfdc17
Author: John Abd-El-Malek <jam@chromium.org>
Date: Thu Nov 23 18:54:41 2017

Stop using deprecated WebContentsObserver::DidGetRedirectForResourceRequest in identity code.

This will go away in favor of DidRedirectNavigation, since the former doesn't work with network service.

BUG= 787891 

Change-Id: Icd94e27b601088c837c28df8d7f6d2f604675ecd
Reviewed-on: https://chromium-review.googlesource.com/786273
Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Commit-Queue: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#518996}
[modify] https://crrev.com/b0d81669d862749d7ae369bdd390a64fa2cfdc17/chrome/browser/extensions/api/identity/web_auth_flow.cc
[modify] https://crrev.com/b0d81669d862749d7ae369bdd390a64fa2cfdc17/chrome/browser/extensions/api/identity/web_auth_flow.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2

commit ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2
Author: John Abd-El-Malek <jam@chromium.org>
Date: Mon Nov 27 19:18:07 2017

Remove WebContentsObserver::DidGetRedirectForResourceRequest as it's not used anymore.

This notification wasn't compatible with the network service, and was redundant with DidRedirectNavigation.

Bug:  787891 
Change-Id: I9b567fa0df00ff7a2c5515120ca15b3ee0a93d41
Reviewed-on: https://chromium-review.googlesource.com/786320
Reviewed-by: Matt Menke <mmenke@chromium.org>
Commit-Queue: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#519360}
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/chrome/browser/captive_portal/captive_portal_tab_helper.cc
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/chrome/browser/chrome_security_exploit_browsertest.cc
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/chrome/browser/extensions/api/identity/web_auth_flow.cc
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/chrome/browser/extensions/api/web_navigation/web_navigation_api.cc
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/chrome/browser/prerender/prerender_contents.cc
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/chrome/browser/prerender/prerender_manager.cc
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/chrome/browser/prerender/prerender_tab_helper.cc
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/chrome/browser/safe_browsing/safe_browsing_navigation_observer.cc
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/content/browser/loader/loader_delegate.h
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/content/browser/loader/resource_dispatcher_host_impl.cc
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/content/browser/loader/resource_dispatcher_host_unittest.cc
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/content/browser/loader_delegate_impl.cc
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/content/browser/loader_delegate_impl.h
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/content/browser/web_contents/web_contents_impl.cc
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/content/browser/web_contents/web_contents_impl.h
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/content/browser/web_contents/web_contents_impl_unittest.cc
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/content/public/browser/resource_request_details.cc
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/content/public/browser/resource_request_details.h
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/content/public/browser/web_contents_observer.h
[modify] https://crrev.com/ea9de63c8bc0762dfebfffbff66c7bb1299f4ca2/content/test/browser_test_utils_browsertest.cc