Add controlled setting indicator for default search engine configuration

chrome/test/data/policy/policy_test_cases.json

 {
   "-- Template --": {
     "intro": "Top-level entries map a policy name to its test parameters, described below.",
 
     "os": ["List of operating systems that support this policy. Valid values:", "win", "linux", "mac", "chromeos"],
     "official_only": "Whether this policy exists in official builds only. Defaults to |false| if not specified.",
     "can_be_recommended": "Whether a recommended value may be set for the policy. Defaults to |false| if not specified.",
     "test_policy": "A policy dictionary that should trigger the managed banner in the settings UI. Usually just sets the current policy.",
     "settings_pages": ["A list of settings pages where the banner should be visible when this policy is set."],
     "note": "If the policy affects any preferences, the following array should be specified with one entry per such preference.",
@@ skipping 746 matching lines @@
     ],
 
     "note": "TODO(joaodasilva): The banner is out of place. http://crbug.com/77791"
   },
 
   "DefaultSearchProviderEnabled": {
     "os": ["win", "linux", "mac", "chromeos"],
     "test_policy": { "DefaultSearchProviderEnabled": false },
     "settings_pages": [],
     "pref_mappings": [
-      { "pref": "default_search_provider.enabled" }
+      { "pref": "default_search_provider.enabled",
+        "indicator_tests": [
+          { "policy": { "DefaultSearchProviderEnabled": false } },
+          { "policy": { "DefaultSearchProviderEnabled": true, "DefaultSearchProviderSearchURL": "http://www.google.com/?q={searchTerms}" } }
+        ]
+      }
     ],
 
     "note": "TODO(joaodasilva): Should be chrome://settings-frame. http://crbug.com/97749"
   },
 
   "DefaultSearchProviderName": {
     "os": ["win", "linux", "mac", "chromeos"],
     "test_policy": { "DefaultSearchProviderSearchURL": "http://www.google.com/?q={searchTerms}", "DefaultSearchProviderName": "google.com" },
     "settings_pages": [],
     "pref_mappings": [
       { "pref": "default_search_provider.name" }
     ]
   },
 
   "DefaultSearchProviderKeyword": {
     "os": ["win", "linux", "mac", "chromeos"],
     "test_policy": { "DefaultSearchProviderSearchURL": "http://www.google.com/?q={searchTerms}", "DefaultSearchProviderKeyword": "google" },
     "settings_pages": [],
     "pref_mappings": [
       { "pref": "default_search_provider.keyword" }
     ]
   },
 
   "DefaultSearchProviderSearchURL": {
     "os": ["win", "linux", "mac", "chromeos"],
     "test_policy": { "DefaultSearchProviderSearchURL": "http://www.google.com/?q={searchTerms}" },
     "settings_pages": [],
     "pref_mappings": [
-      { "pref": "default_search_provider.search_url" }
+      { "pref": "default_search_provider.search_url",
+        "indicator_selector": "[setting=search-engine]",
+        "indicator_tests": [
+          { "policy": { "DefaultSearchProviderEnabled": true, "DefaultSearchProviderSearchURL": "http://www.google.com/?q={searchTerms}" } }
+        ]
+      }
     ],
 
     "note": "TODO(joaodasilva): Should be chrome://settings-frame. http://crbug.com/97749"
   },
 
   "DefaultSearchProviderSuggestURL": {
     "os": ["win", "linux", "mac", "chromeos"],
     "test_policy": { "DefaultSearchProviderSearchURL": "http://www.google.com/?q={searchTerms}", "DefaultSearchProviderSuggestURL": "http://www.google.com/suggest?q={searchTerms}" },
     "settings_pages": [],
     "pref_mappings": [
@@ skipping 919 matching lines @@
     "test_policy": { "GCFUserDataDir": "${user_name}/test-frame" },
     "settings_pages": []
   },
 
   "AdditionalLaunchParameters": {
     "os": [],
     "test_policy": { "AdditionalLaunchParameters": "--enable-media-stream" },
     "settings_pages": []
   }
 }