chromium_tests: automatically set up test genrators

scripts/slave/recipe_modules/chromium_tests/chromium_win.py

Index: scripts/slave/recipe_modules/chromium_tests/chromium_win.py
diff --git a/scripts/slave/recipe_modules/chromium_tests/chromium_win.py b/scripts/slave/recipe_modules/chromium_tests/chromium_win.py
index d8d8e171e88f99dc27716623f88ad2f4711adb08..2e2948e9a963a2d15cd9d2170896e4b89a9f3f82 100644
--- a/scripts/slave/recipe_modules/chromium_tests/chromium_win.py
+++ b/scripts/slave/recipe_modules/chromium_tests/chromium_win.py
@@ -46,11 +46,6 @@ SPEC = {
         'TARGET_BITS': 64,
       },
       'bot_type': 'tester',
-      'test_generators': [
-        steps.generate_gtest,
-        steps.generate_script,
-        steps.generate_isolated_script,
-      ],
       'tests': [
         steps.MiniInstallerTest(),
       ],
@@ -73,11 +68,6 @@ SPEC = {
         'TARGET_BITS': 32,
       },
       'bot_type': 'tester',
-      'test_generators': [
-        steps.generate_gtest,
-        steps.generate_script,
-        steps.generate_isolated_script,
-      ],
       'parent_buildername': 'Win Builder',
       'testing': {
         'platform': 'win',
@@ -97,11 +87,6 @@ SPEC = {
         'TARGET_BITS': 32,
       },
       'bot_type': 'tester',
-      'test_generators': [
-        steps.generate_gtest,
-        steps.generate_script,
-        steps.generate_isolated_script,
-      ],
       'tests': [
         steps.MiniInstallerTest(),
       ],
@@ -136,11 +121,6 @@ SPEC = {
         'TARGET_BITS': 64,
       },
       'bot_type': 'tester',
-      'test_generators': [
-        steps.generate_gtest,
-        steps.generate_script,
-        steps.generate_isolated_script,
-      ],
       'tests': [
         steps.MiniInstallerTest(),
       ],
@@ -197,11 +177,6 @@ SPEC = {
         'TARGET_BITS': 32,
       },
       'bot_type': 'tester',
-      'test_generators': [
-        steps.generate_gtest,
-        steps.generate_script,
-        steps.generate_isolated_script,
-      ],
       'parent_buildername': 'Win Builder (dbg)',
       'testing': {
         'platform': 'win',