Enable minimum_chrome_version manifest key for themes

Bug: 1152517
Change-Id: I586c06b5e42d8735c3f7fec3fed69bce7e126561
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2558079Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Reviewed-by: Gayane Petrosyan <gayane@chromium.org>
Commit-Queue: Utkarsh Patankar <utkpat@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#833185}

chrome/common/extensions/api/_manifest_features.json

@@ -167,7 +167,7 @@
   "minimum_chrome_version": {
     "channel": "stable",
     "extension_types": [
-      "extension", "legacy_packaged_app", "hosted_app", "platform_app"
+      "extension", "legacy_packaged_app", "hosted_app", "platform_app", "theme"
     ]
   },
   "natively_connectable": {

chrome/common/extensions/manifest_tests/extension_manifests_initvalue_unittest.cc

@@ -156,6 +156,9 @@ TEST_F(InitValueManifestTest, InitFromValueValid) {
     // Test a hosted app with a requirements section.
     Testcase("init_valid_app_requirements.json"),
 
+    // Test a theme with a minimum_chrome_version.
+    Testcase("init_valid_theme_minimum_chrome.json"),
+
     // Verify empty permission settings are considered valid.
     Testcase("init_valid_permissions_empty.json"),
 

chrome/test/data/extensions/manifest_tests/init_valid_theme_minimum_chrome.json

+{
+  "name": "Minimum Version Theme",
+  "manifest_version": 2,
+  "version": "1",
+  "theme": {
+    "colors": {
+      "frame": [100, 100, 100]
+    }
+  },
+  "minimum_chrome_version": "1.0.0.1"
+}