Revert "RC: Connect the Local DB to TabHelper and add browsertests."

This reverts commit 8f4ffc9a.

Reason for revert: Break some tests on CrOS.

Original change's description:
> RC: Connect the Local DB to TabHelper and add browsertests.
> 
> Bug: 773382
> Change-Id: Ie7cbbf2c74bfbf1f1522b2a1f775a392545ad0a9
> Reviewed-on: https://chromium-review.googlesource.com/1088196
> Commit-Queue: Sébastien Marchand <sebmarchand@chromium.org>
> Reviewed-by: François Doray <fdoray@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#568519}

TBR=fdoray@chromium.org,sebmarchand@chromium.org

Change-Id: Id145ad7b9de4422794daba06eedeb2f54e5d28a1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 773382
Reviewed-on: https://chromium-review.googlesource.com/1106978Reviewed-by: Sébastien Marchand <sebmarchand@chromium.org>
Commit-Queue: Sébastien Marchand <sebmarchand@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568611}

chrome/browser/resource_coordinator/local_site_characteristics_data_impl.h

@@ -101,8 +101,6 @@ class LocalSiteCharacteristicsDataImpl
     return site_characteristics_;
   }
 
-  size_t loaded_tabs_count_for_testing() const { return loaded_tabs_count_; }
-
   size_t loaded_tabs_in_background_count_for_testing() const {
     return loaded_tabs_in_background_count_;
   }

chrome/browser/resource_coordinator/local_site_characteristics_data_writer.cc

@@ -66,8 +66,6 @@ void LocalSiteCharacteristicsDataWriter::NotifyUpdatesTitleInBackground() {
 void LocalSiteCharacteristicsDataWriter::NotifyUsesAudioInBackground() {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   DCHECK_EQ(TabVisibility::kBackground, tab_visibility_);
-  // TODO(sebmarchand): Do not advance the background audio observation time
-  // when the WebContents has never played audio.
   impl_->NotifyUsesAudioInBackground();
 }
 

chrome/browser/resource_coordinator/tab_helper.cc

@@ -27,10 +27,6 @@
 #include "services/resource_coordinator/public/mojom/service_constants.mojom.h"
 #include "services/service_manager/public/cpp/connector.h"
 
-#if !defined(OS_ANDROID)
-#include "chrome/browser/resource_coordinator/local_site_characteristics_webcontents_observer.h"
-#endif
-
 DEFINE_WEB_CONTENTS_USER_DATA_KEY(
     resource_coordinator::ResourceCoordinatorTabHelper);
 
@@ -66,14 +62,6 @@ ResourceCoordinatorTabHelper::ResourceCoordinatorTabHelper(
 
     TabMemoryMetricsReporter::Get()->StartReporting(TabLoadTracker::Get());
   }
-
-#if !defined(OS_ANDROID)
-  if (base::FeatureList::IsEnabled(features::kSiteCharacteristicsDatabase)) {
-    local_site_characteristics_wc_observer_ =
-        std::make_unique<LocalSiteCharacteristicsWebContentsObserver>(
-            web_contents);
-  }
-#endif
 }
 
 ResourceCoordinatorTabHelper::~ResourceCoordinatorTabHelper() = default;

chrome/browser/resource_coordinator/tab_helper.h

@@ -9,7 +9,6 @@
 
 #include "base/macros.h"
 #include "base/time/time.h"
-#include "build/build_config.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 #include "services/metrics/public/cpp/ukm_source_id.h"
@@ -18,7 +17,6 @@
 namespace resource_coordinator {
 
 class PageResourceCoordinator;
-class LocalSiteCharacteristicsWebContentsObserver;
 
 class ResourceCoordinatorTabHelper
     : public content::WebContentsObserver,
@@ -65,11 +63,6 @@ class ResourceCoordinatorTabHelper
       page_resource_coordinator_;
   ukm::SourceId ukm_source_id_ = ukm::kInvalidSourceId;
 
-#if !defined(OS_ANDROID)
-  std::unique_ptr<LocalSiteCharacteristicsWebContentsObserver>
-      local_site_characteristics_wc_observer_;
-#endif
-
   // Favicon and title are set when a page is loaded, we only want to send
   // signals to GRC about title and favicon update from the previous title and
   // favicon, thus we want to ignore the very first update since it is always

chrome/test/BUILD.gn

@@ -697,7 +697,6 @@ test("browser_tests") {
       "../browser/renderer_host/render_process_host_chrome_browsertest.cc",
       "../browser/repost_form_warning_browsertest.cc",
       "../browser/resource_coordinator/local_site_characteristics_data_store_factory_browsertest.cc",
-      "../browser/resource_coordinator/local_site_characteristics_database_browsertest.cc",
       "../browser/resource_coordinator/render_process_probe_browsertest.cc",
       "../browser/resource_coordinator/tab_activity_watcher_browsertest.cc",
       "../browser/resource_coordinator/tab_manager_browsertest.cc",

chrome/test/data/resource_coordinator/site_characteristics_test_page.html

-<!doctype html>
-<html lang="en">
-
-<head>
-  <meta charset="utf-8">
-  <title>Site Characteristics Database Test Page</title>
-</head>
-
-<body>
-  <script>
-    // Requests permission to display Web Notifications.
-    function RequestNotificationsPermission() {
-      Notification.requestPermission(function (level) {
-        domAutomationController.send(level);
-      });
-    }
-
-    // Instantiates a new non-persistent notification with the given |title|
-    // and |options| and then closes it.
-    function DisplayAndCloseNonPersistentNotification(title, options) {
-      const notification = new Notification(title, options || {});
-      notification.addEventListener('show', e => {
-        notification.close();
-      });
-      notification.addEventListener('close', e => {
-        domAutomationController.send('ok');
-      });
-    }
-
-    // Play |test_audio.ogg|.
-    function PlayAudio() {
-      var audio = new Audio('test_audio.ogg');
-      audio.addEventListener('loadeddata', function () {
-        audio.play();
-      })
-    }
-
-    // Change the page title to |new_title|
-    function ChangeTitle(new_title) {
-      document.title = new_title;
-    }
-
-    // Change the favicon to |default_favicon.png|.
-    function ChangeFavicon() {
-      favicon = document.createElement('link');
-      favicon.setAttribute('rel', 'shortcut icon');
-      var head = document.querySelector('head');
-      head.appendChild(favicon);
-      favicon.setAttribute('type', 'image/png');
-      favicon.setAttribute('href', 'default_favicon.png');
-    }
-  </script>
-</body>
-
-</html>
\ No newline at end of file