Enable media_perftests to run on Windows, Mac, and Linux.

tools/perf/generate_perf_json.py

Index: tools/perf/generate_perf_json.py
diff --git a/tools/perf/generate_perf_json.py b/tools/perf/generate_perf_json.py
index 29783f0ff04134d94af148df8dc18d60fe6b8089..4ccd4f4d2c985184b2814d31019acaec337f68b3 100755
--- a/tools/perf/generate_perf_json.py
+++ b/tools/perf/generate_perf_json.py
@@ -244,7 +244,9 @@ def get_waterfall_config():
        'device_ids': [
            'build132-m1', 'build133-m1',
            'build134-m1', 'build135-m1', 'build136-m1'
-          ]
+          ],
+       'perf_tests': [
+         ('media_perftests', 2)]
       }
     ])
   waterfall = add_tester(
@@ -259,7 +261,8 @@ def get_waterfall_config():
           ],
        'perf_tests': [
          ('load_library_perf_tests', 2),
-         ('performance_browser_tests', 2)]
+         ('performance_browser_tests', 2),
+         ('media_perftests', 3)]
       }
     ])
   waterfall = add_tester(
@@ -275,7 +278,8 @@ def get_waterfall_config():
           ],
        'perf_tests': [
          ('load_library_perf_tests', 2),
-         ('performance_browser_tests', 2)]
+         ('performance_browser_tests', 2),
+         ('media_perftests', 3)]
       }
     ])
   waterfall = add_tester(
@@ -308,7 +312,8 @@ def get_waterfall_config():
        'perf_tests': [
          ('angle_perftests', 2),
          ('load_library_perf_tests', 2),
-         ('performance_browser_tests', 2)]
+         ('performance_browser_tests', 2),
+         ('media_perftests', 3)]
       }
     ])
   waterfall = add_tester(
@@ -338,7 +343,8 @@ def get_waterfall_config():
        'perf_tests': [
          ('angle_perftests', 2),
          ('load_library_perf_tests', 2),
-         ('performance_browser_tests', 2)]
+         ('performance_browser_tests', 2),
+         ('media_perftests', 3)]
       }
     ])
 
@@ -352,7 +358,9 @@ def get_waterfall_config():
        'device_ids': [
            'build102-b1', 'build103-b1',
            'build104-b1', 'build105-b1', 'build106-b1'
-          ]
+          ],
+       'perf_tests': [
+         ('media_perftests', 2)]
       }
     ])
   waterfall = add_tester(
@@ -419,7 +427,8 @@ def get_waterfall_config():
        'perf_tests': [
          ('cc_perftests', 2),
          ('load_library_perf_tests', 2),
-         ('tracing_perftests', 2)]
+         ('tracing_perftests', 2),
+         ('media_perftests', 3)]
       }
     ])