[on-hold][subresource_filter] Add ActivationTracker to track all activated contents

chrome/browser/subresource_filter/chrome_subresource_filter_client.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/subresource_filter/chrome_subresource_filter_client.h"
 
 #include <string>
 
 #include "base/metrics/histogram_macros.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/content_settings/host_content_settings_map_factory.h"
 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/subresource_filter/subresource_filter_activation_tracker.h"
+#include "chrome/browser/subresource_filter/subresource_filter_profile_context.h"
 #include "chrome/browser/subresource_filter/subresource_filter_profile_context_factory.h"
 #include "chrome/browser/ui/android/content_settings/subresource_filter_infobar_delegate.h"
 #include "components/content_settings/core/browser/host_content_settings_map.h"
 #include "components/content_settings/core/common/content_settings_types.h"
 #include "components/subresource_filter/content/browser/content_ruleset_service.h"
+#include "components/subresource_filter/core/common/activation_level.h"
+#include "components/subresource_filter/core/common/activation_state.h"
 #include "content/public/browser/navigation_handle.h"
 
 ChromeSubresourceFilterClient::ChromeSubresourceFilterClient(
     content::WebContents* web_contents)
-    : web_contents_(web_contents), did_show_ui_for_navigation_(false) {
-  DCHECK(web_contents);
-  SubresourceFilterProfileContextFactory::EnsureForProfile(
-      Profile::FromBrowserContext(web_contents_->GetBrowserContext()));
+    : content::WebContentsObserver(web_contents),
+      profile_context_(SubresourceFilterProfileContextFactory::GetForProfile(
+          Profile::FromBrowserContext(web_contents->GetBrowserContext()))),
+      did_show_ui_for_navigation_(false) {
+  DCHECK(profile_context_);
 }
 
 ChromeSubresourceFilterClient::~ChromeSubresourceFilterClient() {}
 
 void ChromeSubresourceFilterClient::ToggleNotificationVisibility(
     bool visibility) {
   if (did_show_ui_for_navigation_ && visibility)
     return;
 
   did_show_ui_for_navigation_ = visibility;
   TabSpecificContentSettings* content_settings =
-      TabSpecificContentSettings::FromWebContents(web_contents_);
+      TabSpecificContentSettings::FromWebContents(web_contents());
 
   // |visibility| is false when a new navigation starts.
   if (visibility) {
     content_settings->OnContentBlocked(
         CONTENT_SETTINGS_TYPE_SUBRESOURCE_FILTER);
     LogAction(kActionUIShown);
 #if defined(OS_ANDROID)
     InfoBarService* infobar_service =
-        InfoBarService::FromWebContents(web_contents_);
+        InfoBarService::FromWebContents(web_contents());
     SubresourceFilterInfobarDelegate::Create(infobar_service);
 #endif
   } else {
     LogAction(kActionNavigationStarted);
   }
 }
 
 bool ChromeSubresourceFilterClient::ShouldSuppressActivation(
     content::NavigationHandle* navigation_handle) {
   const GURL& url(navigation_handle->GetURL());
   return navigation_handle->IsInMainFrame() &&
          (whitelisted_hosts_.find(url.host()) != whitelisted_hosts_.end() ||
           GetContentSettingForUrl(url) == CONTENT_SETTING_BLOCK);
 }
 
 void ChromeSubresourceFilterClient::WhitelistByContentSettings(
     const GURL& url) {
   // Whitelist via content settings.
   Profile* profile =
-      Profile::FromBrowserContext(web_contents_->GetBrowserContext());
+      Profile::FromBrowserContext(web_contents()->GetBrowserContext());
   DCHECK(profile);
   HostContentSettingsMap* settings_map =
       HostContentSettingsMapFactory::GetForProfile(profile);
   settings_map->SetContentSettingDefaultScope(
       url, url, ContentSettingsType::CONTENT_SETTINGS_TYPE_SUBRESOURCE_FILTER,
       std::string(), CONTENT_SETTING_BLOCK);
 
   LogAction(kActionContentSettingsBlockedFromUI);
 }
 
 void ChromeSubresourceFilterClient::WhitelistInCurrentWebContents(
     const GURL& url) {
   if (url.SchemeIsHTTPOrHTTPS())
     whitelisted_hosts_.insert(url.host());
 }
 
+void ChromeSubresourceFilterClient::OnPageActivated(
+    const subresource_filter::ActivationState& state) {
+  DCHECK_NE(state.activation_level,
+            subresource_filter::ActivationLevel::DISABLED);
+
+  // Do not care about DRYRUN mode.
+  bool activated =
+      state.activation_level == subresource_filter::ActivationLevel::ENABLED;
+  profile_context_->activation_tracker()->OnWebContentsActivated(web_contents(),
+                                                                 activated);
+}
+
 // static
 void ChromeSubresourceFilterClient::LogAction(SubresourceFilterAction action) {
   UMA_HISTOGRAM_ENUMERATION("SubresourceFilter.Actions", action,
                             kActionLastEntry);
 }
 
 ContentSetting ChromeSubresourceFilterClient::GetContentSettingForUrl(
     const GURL& url) {
   Profile* profile =
-      Profile::FromBrowserContext(web_contents_->GetBrowserContext());
+      Profile::FromBrowserContext(web_contents()->GetBrowserContext());
   DCHECK(profile);
   HostContentSettingsMap* settings_map =
       HostContentSettingsMapFactory::GetForProfile(profile);
   return settings_map->GetContentSetting(
       url, url, ContentSettingsType::CONTENT_SETTINGS_TYPE_SUBRESOURCE_FILTER,
       std::string());
 }
 
 subresource_filter::VerifiedRulesetDealer::Handle*
 ChromeSubresourceFilterClient::GetRulesetDealer() {
   subresource_filter::ContentRulesetService* ruleset_service =
       g_browser_process->subresource_filter_ruleset_service();
   return ruleset_service ? ruleset_service->ruleset_dealer() : nullptr;
 }
+
+void ChromeSubresourceFilterClient::DidStartNavigation(
+    content::NavigationHandle* navigation_handle) {
+  if (navigation_handle->IsInMainFrame()) {
+    profile_context_->activation_tracker()->OnWebContentsActivated(
+        web_contents(), false /* activated */);
+  }
+}
+
+void ChromeSubresourceFilterClient::WebContentsDestroyed() {
+  profile_context_->activation_tracker()->OnWebContentsDestroyed(
+      web_contents());
+}