Cherry-pick of https://crrev.com/c/3666357 into M103

Reland "Implement new design for CHIPS OT and delete old design"

This is a reland of commit 5f95d48

Original change's description:
> Implement new design for CHIPS OT and delete old design
>
> This CL deletes the client hint-based origin trial design which I
> landed in https://crrev.com/c/3453430.
>
> It also implements the new origin trial design announced here:
> privacysandbox/privacy-sandbox-dev-support#33
>
> The new origin trial design only checks the Origin-Trial header when an
> HTTP response has a Set-Cookie header with a Partitioned attribute in
> the cookie line. The resulting cookie from the Set-Cookie with
> Partitioned does NOT have to be valid.
>
> In order to do this, I added a new field, has_partitioned_cookie, to
> URLResponseHead. This bit indicates to the browser/renderer that the
> response had a Set-Cookie header with Partitioned.
>
> The network service has no idea if the site is in the OT at request
> time, so we will set any cookie with the Partitioned attribute as
> partitioned even if the site is not in the OT.
>
> Afterwards, we then check the Origin-Trial header and token in the
> browser for navigation requests and the renderer for subresource
> requests. If a site is not a valid OT participant, we convert that
> URL's partitioned cookies to unpartitioned.
>
> In order to do this in the renderer, we had to give
> RestrictedCookieManager the ability to change any URL's partitioned
> cookies to unpartitioned. Since unpartitioned cookies are already the
> state of the art for the web, it's low risk to give renderers this
> ability. RCM's ability to do this will be temporary and only for the
> duration of the OT.
>
> The entire feature is tested end-to-end in
> navigation_request_browsertest.cc for now.
>
> Bug: 1296161,1327045
> Change-Id: I08490a7df4cbb93e121034d67b88ce4a69f32c37
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3650844
> Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
> Reviewed-by: Maks Orlovich <morlovich@chromium.org>
> Reviewed-by: Nate Fischer <ntfschr@chromium.org>
> Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
> Reviewed-by: Ari Chivukula <arichiv@chromium.org>
> Reviewed-by: Daniel Cheng <dcheng@chromium.org>
> Reviewed-by: Philip Rogers <pdr@chromium.org>
> Commit-Queue: Dylan Cutler <dylancutler@google.com>
> Cr-Commit-Position: refs/heads/main@{#1007159}

(cherry picked from commit 196d0a9)

Bug: 1296161,1327045
Change-Id: I1f73a4ff04121d14a2ae8eb91f3f8e3aed9068f4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3666357
Reviewed-by: Maks Orlovich <morlovich@chromium.org>
Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Commit-Queue: Dylan Cutler <dylancutler@google.com>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Reviewed-by: Victor Tan <victortan@chromium.org>
Reviewed-by: Michael Bai <michaelbai@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#1007601}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3679821
Owners-Override: Krishna Govind <govind@chromium.org>
Reviewed-by: Krishna Govind <govind@chromium.org>
Cr-Commit-Position: refs/branch-heads/5060@{#439}
Cr-Branched-From: b83393d-refs/heads/main@{#1002911}

android_webview/browser/network_service/aw_proxying_restricted_cookie_manager.cc

@@ -213,4 +213,10 @@ bool AwProxyingRestrictedCookieManager::AllowCookies(
   }
 }
 
+void AwProxyingRestrictedCookieManager::
+    ConvertPartitionedCookiesToUnpartitioned(const GURL& url) {
+  underlying_restricted_cookie_manager_
+      ->ConvertPartitionedCookiesToUnpartitioned(url);
+}
+
 }  // namespace android_webview

android_webview/browser/network_service/aw_proxying_restricted_cookie_manager.h

@@ -83,6 +83,9 @@ class AwProxyingRestrictedCookieManager
   bool AllowCookies(const GURL& url,
                     const net::SiteForCookies& site_for_cookies) const;
 
+  // TODO(https://crbug.com/1296161): Delete this function.
+  void ConvertPartitionedCookiesToUnpartitioned(const GURL& url) override;
+
  private:
   AwProxyingRestrictedCookieManager(
       mojo::PendingRemote<network::mojom::RestrictedCookieManager>