Switched remaining GPU test bots to be pure testers, triggered by builders.

masters/master.chromium.webkit/master_gpu_latest_cfg.py

Index: masters/master.chromium.webkit/master_gpu_latest_cfg.py
diff --git a/masters/master.chromium.webkit/master_gpu_latest_cfg.py b/masters/master.chromium.webkit/master_gpu_latest_cfg.py
index 77c96fa17e0e6c03991fc5e7cd25881c38543c41..311e4a364f5b3cbb242b73486cff0c5427676239 100644
--- a/masters/master.chromium.webkit/master_gpu_latest_cfg.py
+++ b/masters/master.chromium.webkit/master_gpu_latest_cfg.py
@@ -6,15 +6,18 @@
 from master import master_config
 from master.factory import annotator_factory
 
+import collections
+
 defaults = {}
 
 helper = master_config.Helper(defaults)
 B = helper.Builder
 F = helper.Factory
+T = helper.Triggerable
 
 # TODO(kbr): it would be better if this waterfall were refactored so
 # that we could access the slaves_list here.
-gpu_bot_info = [
+gpu_slave_info = [
   {
     'builder': 'GPU Win Builder',
     'factory_id': 'f_gpu_win_builder_rel',
@@ -30,15 +33,17 @@ gpu_bot_info = [
   {
     'builder': 'GPU Win7 (NVIDIA)',
     'factory_id': 'f_gpu_win_rel',
-    'recipe': 'gpu/build_and_test',
+    'recipe': 'gpu/download_and_test',
     'build_config': 'Release',
     'perf_id': 'gpu-webkit-win7-nvidia',
+    'triggered_by': 'GPU Win Builder',
   },
   {
     'builder': 'GPU Win7 (dbg) (NVIDIA)',
     'factory_id': 'f_gpu_win_dbg',
-    'recipe': 'gpu/build_and_test',
+    'recipe': 'gpu/download_and_test',
     'build_config': 'Debug',
+    'triggered_by': 'GPU Win Builder (dbg)',
   },
   {
     'builder': 'GPU Mac Builder',
@@ -55,15 +60,17 @@ gpu_bot_info = [
   {
     'builder': 'GPU Mac10.7',
     'factory_id': 'f_gpu_mac_rel',
-    'recipe': 'gpu/build_and_test',
+    'recipe': 'gpu/download_and_test',
     'build_config': 'Release',
     'perf_id': 'gpu-webkit-mac',
+    'triggered_by': 'GPU Mac Builder',
   },
   {
     'builder': 'GPU Mac10.7 (dbg)',
     'factory_id': 'f_gpu_mac_dbg',
-    'recipe': 'gpu/build_and_test',
+    'recipe': 'gpu/download_and_test',
     'build_config': 'Debug',
+    'triggered_by': 'GPU Mac Builder (dbg)',
   },
   {
     'builder': 'GPU Linux Builder',
@@ -80,15 +87,17 @@ gpu_bot_info = [
   {
     'builder': 'GPU Linux (NVIDIA)',
     'factory_id': 'f_gpu_linux_rel',
-    'recipe': 'gpu/build_and_test',
+    'recipe': 'gpu/download_and_test',
     'build_config': 'Release',
     'perf_id': 'gpu-webkit-linux-nvidia',
+    'triggered_by': 'GPU Linux Builder',
   },
   {
     'builder': 'GPU Linux (dbg) (NVIDIA)',
     'factory_id': 'f_gpu_linux_dbg',
-    'recipe': 'gpu/build_and_test',
+    'recipe': 'gpu/download_and_test',
     'build_config': 'Debug',
+    'triggered_by': 'GPU Linux Builder (dbg)',
   },
 ]
 
@@ -96,20 +105,57 @@ m_annotator = annotator_factory.AnnotatorFactory()
 
 defaults['category'] = 'gpu'
 
-for bot in gpu_bot_info:
+# Maps the parent builder to a set of the names of the builders it triggers.
+trigger_map = collections.defaultdict(list)
+# Maps the name of the parent builder to the (synthesized) name of its
+# trigger, wrapped in a list.
+trigger_name_map = {}
+next_group_id = 0
+# Note this code is very similar to that in recipe_master_helper.py.
+# Unfortunately due to the different structure of this waterfall it's
+# impossible to share the code.
+def BuilderExists(builder_name):
+  for s in gpu_slave_info:
+    if s['builder'] == builder_name:
+      return True
+  return False
+
+for slave in gpu_slave_info:
+  builder = slave['builder']
+  parent_builder = slave.get('triggered_by')
+  if parent_builder is not None:
+    if not BuilderExists(parent_builder):
+      raise Exception('Could not find parent builder %s for builder %s' %
+                      (parent_builder, builder))
+    trigger_map[parent_builder].append(builder)
+    if parent_builder not in trigger_name_map:
+      trigger_name_map[parent_builder] = 'trigger_group_%d' % next_group_id
+      next_group_id += 1
+
+# Create triggers
+for trigger_name in trigger_name_map.values():
+  T(trigger_name)
+
+# Set up bots
+for slave in gpu_slave_info:
   factory_properties = {
     'test_results_server': 'test-results.appspot.com',
     'generate_gtest_json': True,
-    'build_config': bot['build_config'],
+    'build_config': slave['build_config'],
     'top_of_tree_blink': True
   }
-  if 'perf_id' in bot:
+  if 'perf_id' in slave:
     factory_properties['show_perf_results'] = True
-    factory_properties['perf_id'] = bot['perf_id']
-  B(bot['builder'], bot['factory_id'], scheduler='global_scheduler')
-  F(bot['factory_id'], m_annotator.BaseFactory(
-      bot['recipe'],
-      factory_properties))
+    factory_properties['perf_id'] = slave['perf_id']
+  name = slave['builder']
+  scheduler = 'global_scheduler'
+  if 'triggered_by' in slave:
+    scheduler = trigger_name_map[slave['triggered_by']]
+  B(name, slave['factory_id'], scheduler=scheduler)
+  F(slave['factory_id'], m_annotator.BaseFactory(
+    slave['recipe'],
+    factory_properties,
+    [trigger_name_map[name]] if name in trigger_name_map else None))
 
 
 def Update(_config, _active_master, c):