[Bento] Adds a new flag for the Bento feature

Adds a new chrome://flags entry to enable the offline Bento
experience feature.

Bug: 1110112
Change-Id: I73cec4264465711f0e98c0b8c8b5d54013e83257
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2321342Reviewed-by: Donn Denman <donnd@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Commit-Queue: Alex Hawker <ahawker@google.com>
Cr-Commit-Position: refs/heads/master@{#792881}

chrome/browser/about_flags.cc

@@ -2337,6 +2337,9 @@ const FeatureEntry kFeatureEntries[] = {
     {"related-searches", flag_descriptions::kRelatedSearchesName,
      flag_descriptions::kRelatedSearchesDescription, kOsAndroid,
      FEATURE_VALUE_TYPE(chrome::android::kRelatedSearches)},
+    {"bento-offline", flag_descriptions::kBentoOfflineName,
+     flag_descriptions::kBentoOfflineDescription, kOsAndroid,
+     FEATURE_VALUE_TYPE(chrome::android::kBentoOffline)},
 #endif  // OS_ANDROID
     {"show-autofill-type-predictions",
      flag_descriptions::kShowAutofillTypePredictionsName,

chrome/browser/flag-metadata.json

@@ -396,6 +396,11 @@
     "owners": [ "sorin", "waffles", "tiborg" ],
     "expiry_milestone": 76
   },
+  {
+    "name": "bento-offline",
+    "owners": [ "ahawker@google.com", "donnd" ],
+    "expiry_milestone": 89
+  },
   {
     "name": "block-external-form-redirects-no-gesture",
     "owners": [ "jochen", "tedchoc" ],

chrome/browser/flag_descriptions.cc

@@ -2540,6 +2540,11 @@ const char kBackgroundTaskComponentUpdateName[] =
 const char kBackgroundTaskComponentUpdateDescription[] =
     "Schedule component updates with BackgroundTaskScheduler";
 
+const char kBentoOfflineName[] =
+    "Enables an experiment for Offline Bento content on Android";
+const char kBentoOfflineDescription[] =
+    "Enables displaying Bento content on the offline page for Android.";
+
 const char kCCTIncognitoName[] = "Chrome Custom Tabs Incognito mode";
 const char kCCTIncognitoDescription[] =
     "Enables incognito mode for Chrome Custom Tabs, on Android.";

chrome/browser/flag_descriptions.h

@@ -1467,6 +1467,9 @@ extern const char kAutofillUseMobileLabelDisambiguationDescription[];
 extern const char kBackgroundTaskComponentUpdateName[];
 extern const char kBackgroundTaskComponentUpdateDescription[];
 
+extern const char kBentoOfflineName[];
+extern const char kBentoOfflineDescription[];
+
 extern const char kCCTIncognitoName[];
 extern const char kCCTIncognitoDescription[];
 

chrome/browser/flags/android/chrome_feature_list.cc

@@ -109,6 +109,7 @@ const base::Feature* kFeaturesExposedToJava[] = {
     &kAndroidPartnerCustomizationPhenotype,
     &kAndroidPayIntegrationV2,
     &kAndroidSearchEngineChoiceNotification,
+    &kBentoOffline,
     &kCastDeviceFilter,
     &kCloseTabSuggestions,
     &kCCTBackgroundTab,
@@ -310,6 +311,9 @@ const base::Feature kAndroidSearchEngineChoiceNotification{
 const base::Feature kBackgroundTaskComponentUpdate{
     "BackgroundTaskComponentUpdate", base::FEATURE_DISABLED_BY_DEFAULT};
 
+const base::Feature kBentoOffline{"BentoOffline",
+                                  base::FEATURE_DISABLED_BY_DEFAULT};
+
 const base::Feature kConditionalTabStripAndroid{
     "ConditionalTabStripAndroid", base::FEATURE_DISABLED_BY_DEFAULT};
 

chrome/browser/flags/android/chrome_feature_list.h

@@ -22,6 +22,7 @@ extern const base::Feature kAndroidPartnerCustomizationPhenotype;
 extern const base::Feature kAndroidPayIntegrationV2;
 extern const base::Feature kAndroidSearchEngineChoiceNotification;
 extern const base::Feature kBackgroundTaskComponentUpdate;
+extern const base::Feature kBentoOffline;
 extern const base::Feature kCloseTabSuggestions;
 extern const base::Feature kCastDeviceFilter;
 extern const base::Feature kCCTBackgroundTab;

chrome/browser/flags/android/java/src/org/chromium/chrome/browser/flags/ChromeFeatureList.java

@@ -220,6 +220,7 @@ public abstract class ChromeFeatureList {
     public static final String AUTOFILL_KEYBOARD_ACCESSORY = "AutofillKeyboardAccessory";
     public static final String BACKGROUND_TASK_SCHEDULER_FOR_BACKGROUND_SYNC =
             "BackgroundTaskSchedulerForBackgroundSync";
+    public static final String BENTO_OFFLINE = "BentoOffline";
     public static final String BIOMETRIC_TOUCH_TO_FILL = "BiometricTouchToFill";
     public static final String CAPTIVE_PORTAL_CERTIFICATE_LIST = "CaptivePortalCertificateList";
     public static final String CCT_BACKGROUND_TAB = "CCTBackgroundTab";

tools/metrics/histograms/enums.xml

@@ -40155,6 +40155,7 @@ from previous Chrome versions.
   <int value="-1715180530"
       label="OmniboxUIExperimentShowSuffixOnAllSearchSuggestions:disabled"/>
   <int value="-1714128884" label="disable-launcher-search-provider-api"/>
+  <int value="-1713602121" label="BentoOffline:enabled"/>
   <int value="-1713564656" label="ProtectSyncCredentialOnReauth:enabled"/>
   <int value="-1711751318" label="enable-data-reduction-proxy-lo-fi-preview"/>
   <int value="-1710772665" label="disable-my-files-navigation"/>
@@ -40961,6 +40962,7 @@ from previous Chrome versions.
       label="kAutofillRationalizeRepeatedServerPredictions:disabled"/>
   <int value="-894214299" label="fill-on-account-select:enabled"/>
   <int value="-894185031" label="HighDynamicRange:disabled"/>
+  <int value="-893673593" label="BentoOffline:disabled"/>
   <int value="-892428689" label="ManualPasswordGenerationAndroid:enabled"/>
   <int value="-891856063" label="MidiManagerAndroid:enabled"/>
   <int value="-889670978" label="AssistantRoutines:disabled"/>