Add resource_sizes to chromium_perf steps for Android

scripts/slave/recipe_modules/chromium_tests/steps.py

Index: scripts/slave/recipe_modules/chromium_tests/steps.py
diff --git a/scripts/slave/recipe_modules/chromium_tests/steps.py b/scripts/slave/recipe_modules/chromium_tests/steps.py
index a67bb356e0e7cb6c155c5e58dc5cf2366a1cf3a1..d1b65945d2e37d09982acee2ce7e9d9f7202716a 100644
--- a/scripts/slave/recipe_modules/chromium_tests/steps.py
+++ b/scripts/slave/recipe_modules/chromium_tests/steps.py
@@ -99,6 +99,23 @@ class ArchiveBuildStep(Test):
     return []
 
 
+class ResourceSizesStep(Test):

[ghost stip (do not use), 2016/09/07 21:30:50]

aw man, another step type? do we really need this?

[jbudorick, 2016/09/07 21:35:43]

The last time a new step vs an existing one (i.e., ScriptTest) came up on
review, phajdan suggested that steps were ok now:
https://codereview.chromium.org/2063323002/#msg25

+  def __init__(self, compile_target, apk_name):
+    self.compile_target = compile_target
+    self.apk_name = apk_name
+
+  def run(self, api, suffix, test_filter=None):
+    apk_path = api.chromium_android.apk_path(self.apk_name)
+    return api.chromium_android.resource_sizes(apk_path, chartjson_file=True)
+
+  def compile_targets(self, api):
+    return [self.compile_target]
+
+  @property
+  def name(self):
+    return 'resource_sizes'  # pragma: no cover
+
+
 class SizesStep(Test):
   def __init__(self, results_url, perf_id):
     self.results_url = results_url