crostini: Default to bookworm for new installs

Switch the default container from Debian bullseye to bookworm. Also
update the os-release info used in unit tests to bookworm.

Bug: b:303757224
Cq-Include-Trybots: luci.chrome.try:chromeos-eve-chrome
Test: Install Crostini
Change-Id: I30e8268b3b90d4af6db2852df40ac074949cc4f5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4974943
Commit-Queue: James Ye <jamesye@google.com>
Reviewed-by: Fergus Dall <sidereal@google.com>
Cr-Commit-Position: refs/heads/main@{#1216534}

chrome/browser/ash/crostini/crostini_manager_unittest.cc

@@ -214,8 +214,8 @@ class CrostiniManagerTest : public testing::Test {
 
     vm_tools::cicerone::OsRelease os_release;
     base::HistogramTester histogram_tester{};
-    os_release.set_pretty_name("Debian GNU/Linux 10 (bullseye)");
-    os_release.set_version_id("11");
+    os_release.set_pretty_name("Debian GNU/Linux 12 (bookworm)");
+    os_release.set_version_id("12");
     os_release.set_id("debian");
     fake_cicerone_client_->set_lxd_container_os_release(os_release);
   }
@@ -1492,8 +1492,8 @@ TEST_F(CrostiniManagerRestartTest, InstallHistogramEntries) {
 TEST_F(CrostiniManagerRestartTest, OsReleaseSetCorrectly) {
   vm_tools::cicerone::OsRelease os_release;
   base::HistogramTester histogram_tester{};
-  os_release.set_pretty_name("Debian GNU/Linux 10 (buster)");
-  os_release.set_version_id("10");
+  os_release.set_pretty_name("Debian GNU/Linux 12 (bookworm)");
+  os_release.set_version_id("12");
   os_release.set_id("debian");
   fake_cicerone_client_->set_lxd_container_os_release(os_release);
 
@@ -1509,14 +1509,14 @@ TEST_F(CrostiniManagerRestartTest, OsReleaseSetCorrectly) {
   EXPECT_EQ(os_release.SerializeAsString(),
             stored_os_release->SerializeAsString());
   histogram_tester.ExpectUniqueSample("Crostini.ContainerOsVersion",
-                                      ContainerOsVersion::kDebianBuster, 1);
+                                      ContainerOsVersion::kDebianBookworm, 1);
 
   // The data for this container should also be stored in prefs.
   const base::Value* os_release_pref_value = GetContainerPrefValue(
       profile(), container_id(), guest_os::prefs::kContainerOsVersionKey);
   EXPECT_NE(os_release_pref_value, nullptr);
   EXPECT_EQ(os_release_pref_value->GetInt(),
-            static_cast<int>(ContainerOsVersion::kDebianBuster));
+            static_cast<int>(ContainerOsVersion::kDebianBookworm));
 }
 
 TEST_F(CrostiniManagerRestartTest, RestartThenUninstall) {

chrome/browser/ash/crostini/crostini_util.h

@@ -33,7 +33,7 @@ class Profile;
 namespace crostini {
 
 inline constexpr char kCrostiniImageAliasPattern[] = "debian/%s";
-inline constexpr char kCrostiniContainerDefaultVersion[] = "bullseye";
+inline constexpr char kCrostiniContainerDefaultVersion[] = "bookworm";
 inline constexpr char kCrostiniContainerFlag[] =
     "crostini-container-install-version";