Remove url_param_filter on desktop

This is mostly a revert of https://crrev.com/c/3523276 and
https://crrev.com/c/3542510. Future cleanup will remove the
component_updater implementation and the iOS code; this targets the
actual functionality changes on desktop.

Bug: 1380927
Change-Id: I4868aa7875c01b557ee81e4fdc16ac0d754c2780
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4008681
Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Matt Reichhoff <mreichhoff@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1068227}

chrome/browser/chrome_content_browser_client.cc

@@ -257,7 +257,6 @@
 #include "components/site_isolation/site_isolation_policy.h"
 #include "components/subresource_filter/content/browser/content_subresource_filter_throttle_manager.h"
 #include "components/translate/core/common/translate_switches.h"
-#include "components/url_param_filter/content/url_param_filter_throttle.h"
 #include "components/variations/variations_associated_data.h"
 #include "components/variations/variations_switches.h"
 #include "content/public/browser/browser_accessibility_state.h"
@@ -5105,11 +5104,6 @@ ChromeContentBrowserClient::CreateURLLoaderThrottles(
   ChromeNavigationUIData* chrome_navigation_ui_data =
       static_cast<ChromeNavigationUIData*>(navigation_ui_data);
 
-  url_param_filter::UrlParamFilterThrottle::MaybeCreateThrottle(
-      profile->GetPrefs()->GetBoolean(
-          policy::policy_prefs::kUrlParamFilterEnabled),
-      wc_getter.Run(), request, &result);
-
 #if BUILDFLAG(SAFE_BROWSING_AVAILABLE)
   bool matches_enterprise_allowlist = safe_browsing::IsURLAllowlistedByPolicy(
       request.url, *profile->GetPrefs());

chrome/browser/ui/browser_navigator.cc

@@ -45,7 +45,6 @@
 #include "components/captive_portal/core/buildflags.h"
 #include "components/no_state_prefetch/browser/no_state_prefetch_manager.h"
 #include "components/prefs/pref_service.h"
-#include "components/url_param_filter/content/cross_otr_web_contents_observer.h"
 #include "content/public/browser/browser_url_handler.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/notification_service.h"
@@ -574,11 +573,6 @@ std::unique_ptr<content::WebContents> CreateTargetContents(
         ->set_is_captive_portal_window();
   }
 #endif
-  url_param_filter::CrossOtrWebContentsObserver::MaybeCreateForWebContents(
-      target_contents.get(),
-      params.privacy_sensitivity ==
-          NavigateParams::PrivacySensitivity::CROSS_OTR,
-      params.started_from_context_menu, params.transition);
 
   return target_contents;
 }

chrome/browser/ui/browser_navigator_params.cc

@@ -81,11 +81,6 @@ void NavigateParams::FillNavigateParamsFromOpenURLParams(
   this->blob_url_loader_factory = params.blob_url_loader_factory;
   this->href_translate = params.href_translate;
   this->impression = params.impression;
-  // `disposition` is eventually coerced out of OFF_THE_RECORD, so we maintain
-  // this field separately.
-  if (params.disposition == WindowOpenDisposition::OFF_THE_RECORD) {
-    this->privacy_sensitivity = PrivacySensitivity::CROSS_OTR;
-  }
 
   // Implementation notes:
   //   The following NavigateParams don't have an equivalent in OpenURLParams:

chrome/browser/ui/browser_navigator_params.h

@@ -333,11 +333,6 @@ struct NavigateParams {
   // observed and fall back to using http scheme if necessary.
   bool is_using_https_as_default_scheme = false;
 
-  // Indicates the degree of privacy sensitivity for the navigation.
-  // Can be used to drive privacy decisions.
-  enum class PrivacySensitivity { CROSS_OTR, CROSS_PROFILE, DEFAULT };
-  PrivacySensitivity privacy_sensitivity = PrivacySensitivity::DEFAULT;
-
  private:
   NavigateParams();
 };