[TTS] Fix privacy workarounds for Related Searches

We cut some corners on privacy that were helpful for the early prototype
of Related Searches. Now those have been removed.

BUG=1064141

Change-Id: I193c60f63d62e915e3dfa28e596fbb4ad6fc8d6a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2365213
Auto-Submit: Donn Denman <donnd@chromium.org>
Commit-Queue: Donn Denman <donnd@chromium.org>
Commit-Queue: Theresa  <twellington@chromium.org>
Reviewed-by: Theresa  <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800158}

chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchPolicy.java

@@ -327,9 +327,6 @@ class ContextualSearchPolicy {
      *         to see if all privacy-related conditions are met to send the base page URL.
      */
     boolean maySendBasePageUrl() {
-        // TODO(donnd): revisit for related searches privacy review. https://crbug.com/1064141.
-        if (isRelatedSearchesEnabled()) return true;
-
         return !isUserUndecided();
     }
 

chrome/browser/android/contextualsearch/contextual_search_delegate.cc

@@ -403,12 +403,6 @@ bool ContextualSearchDelegate::CanSendPageURL(
   if (field_trial_->IsSendBasePageURLDisabled())
     return false;
 
-  // TODO(donnd): privacy review needed before launch.
-  // See https://crbug.com/1064141.
-  if (base::FeatureList::IsEnabled(chrome::android::kRelatedSearches)) {
-    return true;
-  }
-
   // Ensure that the default search provider is Google.
   const TemplateURL* default_search_provider =
       template_url_service->GetDefaultSearchProvider();