Add performance_browser_tests to some Mac bots

tools/perf/core/perf_data_generator.py

Index: tools/perf/core/perf_data_generator.py
diff --git a/tools/perf/core/perf_data_generator.py b/tools/perf/core/perf_data_generator.py
index 1161283d494a2a486260bbd79b9d11586eb5e403..af6852f36ea653fbda37844bc607482aa0a910b9 100755
--- a/tools/perf/core/perf_data_generator.py
+++ b/tools/perf/core/perf_data_generator.py
@@ -453,7 +453,10 @@ def get_waterfall_config():
        'pool': 'Chrome-perf',
        'device_ids': [
            'build4-b1', 'build5-b1', 'build6-b1', 'build7-b1', 'build8-b1'
-          ]
+          ],
+       'perf_tests': [
+         ('performance_browser_tests', 'build6-b1')

[nednguyen, 2017/05/08 18:26:11]

Martiniss: can you help me with picking the lest loaded bots?

[martiniss, 2017/05/09 23:53:29]

build8-b1

[nednguyen, 2017/05/09 23:56:35]

Done.

+       ]
       }
     ])
   waterfall = add_tester(
@@ -467,7 +470,10 @@ def get_waterfall_config():
        'device_ids': [
            'build128-b1', 'build129-b1',
            'build130-b1', 'build131-b1', 'build132-b1'
-          ]
+          ],
+       'perf_tests': [
+         ('performance_browser_tests', 'build128-b1')

[martiniss, 2017/05/09 23:53:29]

build132-b1

[nednguyen, 2017/05/09 23:56:35]

Done.

+       ]
       }
     ])
   waterfall = add_tester(
@@ -481,7 +487,10 @@ def get_waterfall_config():
        'device_ids': [
            'build123-b1', 'build124-b1',
            'build125-b1', 'build126-b1', 'build127-b1'
-          ]
+          ],
+       'perf_tests': [
+         ('performance_browser_tests', 'build124-b1')

[martiniss, 2017/05/09 23:53:29]

build126-b1

[nednguyen, 2017/05/09 23:56:35]

Done.

+       ]
       }
     ])
   waterfall = add_tester(