diff --git a/components/policy/tools/template_writers/writer_configuration.py b/components/policy/tools/template_writers/writer_configuration.py
index 283ea725c5a18..86bd75c6920f0 100755
--- a/components/policy/tools/template_writers/writer_configuration.py
+++ b/components/policy/tools/template_writers/writer_configuration.py
@@ -10,9 +10,6 @@ def GetConfigurationForBuild(defines):
 
   Args:
     defines: Definitions coming from the build system.
-
-  Raises:
-    Exception: If 'defines' contains an unknown build-type.
   '''
   # The prefix of key names in config determines which writer will use their
   # corresponding values:
@@ -24,45 +21,7 @@ def GetConfigurationForBuild(defines):
   # Google:Cat_Google references the external google.admx file.
   # category_path_strings strings in curly braces are looked up from localized
   # 'messages' in policy_templates.json.
-  if '_chromium' in defines:
-    config = {
-        'build': 'chromium',
-        'app_name': 'Chromium',
-        'doc_url': 'https://chromeenterprise.google/policies/',
-        'frame_name': 'Chromium Frame',
-        'os_name': 'ChromiumOS',
-        'webview_name': 'Chromium WebView',
-        'win_config': {
-            'win': {
-                'reg_mandatory_key_name': 'Software\\Policies\\Chromium',
-                'reg_recommended_key_name':
-                'Software\\Policies\\Chromium\\Recommended',
-                'mandatory_category_path': ['chromium'],
-                'recommended_category_path': ['chromium_recommended'],
-                'category_path_strings': {
-                    'chromium': 'Chromium',
-                    'chromium_recommended': 'Chromium - {doc_recommended}',
-                },
-                'namespace': 'Chromium.Policies.Chromium',
-            },
-            'chrome_os': {
-                'reg_mandatory_key_name': 'Software\\Policies\\ChromiumOS',
-                'reg_recommended_key_name':
-                'Software\\Policies\\ChromiumOS\\Recommended',
-                'mandatory_category_path': ['chromium_os'],
-                'recommended_category_path': ['chromium_os_recommended'],
-                'category_path_strings': {
-                    'chromium_os': 'ChromiumOS',
-                    'chromium_os_recommended': 'ChromiumOS - {doc_recommended}',
-                },
-                'namespace': 'Chromium.Policies.ChromiumOS'
-            },
-        },
-        'admx_prefix': 'chromium',
-        'linux_policy_path': '/etc/chromium/policies/',
-        'bundle_id': 'org.chromium',
-    }
-  elif '_google_chrome' in defines or '_is_chrome_for_testing_branded' in defines:
+  if defines.get('_google_chrome', False) == True or defines.get('_is_chrome_for_testing_branded', False) == True:
     if '_google_chrome' in defines:
       linux_policy_path = '/etc/opt/chrome/policies/'
       win_policy_path = 'Software\\Policies\\Google\\Chrome'
@@ -126,7 +85,43 @@ def GetConfigurationForBuild(defines):
         'bundle_id': 'com.google.chrome.ios',
     }
   else:
-    raise Exception('Unknown build')
+    config = {
+        'build': 'thorium',
+        'app_name': 'Thorium',
+        'doc_url': 'https://chromeenterprise.google/policies/',
+        'frame_name': 'Thorium Frame',
+        'os_name': 'ThoriumOS',
+        'webview_name': 'Thorium WebView',
+        'win_config': {
+            'win': {
+                'reg_mandatory_key_name': 'Software\\Policies\\Thorium',
+                'reg_recommended_key_name':
+                'Software\\Policies\\Thorium\\Recommended',
+                'mandatory_category_path': ['chromium'],
+                'recommended_category_path': ['chromium_recommended'],
+                'category_path_strings': {
+                    'chromium': 'Thorium',
+                    'chromium_recommended': 'Thorium - {doc_recommended}',
+                },
+                'namespace': 'Chromium.Policies.Thorium',
+            },
+            'chrome_os': {
+                'reg_mandatory_key_name': 'Software\\Policies\\ThoriumOS',
+                'reg_recommended_key_name':
+                'Software\\Policies\\ThoriumOS\\Recommended',
+                'mandatory_category_path': ['chromium_os'],
+                'recommended_category_path': ['chromium_os_recommended'],
+                'category_path_strings': {
+                    'chromium_os': 'ThoriumOS',
+                    'chromium_os_recommended': 'ThoriumOS - {doc_recommended}',
+                },
+                'namespace': 'Chromium.Policies.ThoriumOS'
+            },
+        },
+        'admx_prefix': 'thorium',
+        'linux_policy_path': '/etc/thorium/policies/',
+        'bundle_id': 'org.chromium.Thorium',
+    }
   if 'version' in defines:
     config['version'] = defines['version']
   if 'major_version' in defines: