[Telemetry] Add StoryExpectations to loading.desktop; disabling uol.com story on lin…

tools/perf/page_sets/loading_desktop.py

Index: tools/perf/page_sets/loading_desktop.py
diff --git a/tools/perf/page_sets/loading_desktop.py b/tools/perf/page_sets/loading_desktop.py
index dc4e8ffdb5307d3a6412423bbd2016c4390bdf3a..1ee6f1c16af1a4bfe28d6046df5d474090d8037c 100644
--- a/tools/perf/page_sets/loading_desktop.py
+++ b/tools/perf/page_sets/loading_desktop.py
@@ -108,3 +108,9 @@ class LoadingDesktopStorySet(story.StorySet):
           self.AddStory(page_cycler_story.PageCyclerStory(url, self,
               shared_page_state_class=shared_page_state.SharedMobilePageState,
               cache_temperature=temp, tags=tags, name=name))
+
+
+class LoadingDesktopExpectations(story.expectations.StoryExpectations):
+  def SetExpectations(self):
+    self.DisableStory(
+        'uol.com.br', [story.expectations.ALL_LINUX], 'crbug.com/723783')