Add cromite flags support: automatically unexpire flags marked as cromite flag (#2081)

 .../Add-cromite-flags-support.grdp            |   9 +

 .../placeholder.txt                           |   1 +

 chrome/browser/ui/ui_features.cc              |   1 +

 chrome/browser/unexpire_flags.cc              |  15 +-

 chrome/common/chrome_features.cc              |   1 +

 .../browser_ui/accessibility/android/BUILD.gn |   1 +

 .../res/xml/accessibility_preferences.xml     |   3 +-

 components/permissions/features.cc            |   2 +

 ...nthetic_trials_active_group_id_provider.cc |   4 +-

 ...ynthetic_trials_active_group_id_provider.h |   4 +-

 components/webui/flags/flags_state.cc         |  59 ++++++

 components/webui/flags/flags_state.cc         |  64 +++++++

 components/webui/flags/resources/app.css      |  24 +++

 components/webui/flags/resources/app.html.ts  |  28 +++

 components/webui/flags/resources/app.ts       |  24 +++

 third_party/blink/public/common/features.h    |   1 +

 ui/base/ui_base_features.cc                   |   1 +

 ui/base/ui_base_features.h                    |   1 +

 93 files changed, 812 insertions(+), 29 deletions(-)

 94 files changed, 831 insertions(+), 30 deletions(-)

 create mode 100644 chrome/browser/flags/android/java/src/org/chromium/chrome/browser/flags/cromite/include_all_directory.java

 create mode 100644 chrome/browser/flags/android/java/src/org/chromium/chrome/browser/flags/cromite/java_template/CromiteCachedFlag.java.tmpl

 create mode 100644 chrome/browser/ui/android/strings/cromite_android_chrome_strings_grd/Add-cromite-flags-support.grdp

+#include "cromite_flags/chrome_browser_ui_ui_features_cc.inc"

 }  // namespace features

diff --git a/chrome/browser/unexpire_flags.cc b/chrome/browser/unexpire_flags.cc

--- a/chrome/browser/unexpire_flags.cc

+++ b/chrome/browser/unexpire_flags.cc

@@ -12,6 +12,7 @@

 #include "base/containers/contains.h"

 #include "base/containers/flat_map.h"

 #include "base/no_destructor.h"

+#include "chrome/browser/about_flags.h"

 #include "chrome/browser/expired_flags_list.h"

 #include "chrome/browser/unexpire_flags_gen.h"

 #include "chrome/common/chrome_version.h"

@@ -117,7 +118,19 @@ bool IsFlagExpired(const flags_ui::FlagsStorage* storage,

   // Otherwise, the flag is expired if its expiration mstone is less than the

   // mstone of this copy of Chromium.

-  return mstone < CHROME_VERSION_MAJOR;

+  if (mstone < CHROME_VERSION_MAJOR) {

+    if (const flags_ui::FeatureEntry* entry =

+          about_flags::GetCurrentFlagsState()->FindFeatureEntryByName(

+            internal_name)) {

+      if (const base::Feature* feature = entry->feature.feature) {

+        if (feature->is_cromite) {

+          return false;

+        }

+      }

+    }

+    return true;

+  }

+  return false;

 }

 namespace testing {

diff --git a/chrome/common/chrome_features.cc b/chrome/common/chrome_features.cc

--- a/chrome/common/chrome_features.cc

+++ b/chrome/common/chrome_features.cc

+    }

     CHECK(entry);

     if (entry->type == FeatureEntry::FEATURE_VALUE ||

@@ -1186,6 +1245,11 @@ void FlagsState::SetFlags(

       std::string feature_internal_name = flag.substr(0, at_index);

       const flags_ui::FeatureEntry* entry =

           FindFeatureEntryByName(feature_internal_name);

+      if (!entry) {

+        if (base::FeatureList::IsCromiteFlag(feature_internal_name)) {

+          continue;

+        }

+      }

       CHECK(entry);

       if (entry->type == FeatureEntry::FEATURE_VALUE ||

diff --git a/components/webui/flags/resources/app.css b/components/webui/flags/resources/app.css

--- a/components/webui/flags/resources/app.css