[Telemetry] Add 'name' attribute for pages, which allows for more human-readable printing

tools/perf/measurements/loading_profile.py

Index: tools/perf/measurements/loading_profile.py
diff --git a/tools/perf/measurements/loading_profile.py b/tools/perf/measurements/loading_profile.py
index e6fd88e7153bcc903093f4ea7f3f53656eb9f884..b36186fe6311fc8840fb770b53056d7385c1e109 100644
--- a/tools/perf/measurements/loading_profile.py
+++ b/tools/perf/measurements/loading_profile.py
@@ -34,7 +34,7 @@ class LoadingProfile(page_measurement.PageMeasurement):
   def WillNavigateToPage(self, page, tab):
     tab.browser.StartProfiling(perf_profiler.PerfProfiler.name(),
                                os.path.join(tempfile.mkdtemp(),
-                                            page.url_as_file_safe_name))
+                                            page.file_safe_name))
 
   def MeasurePage(self, page, tab, results):
     # In current telemetry tests, all tests wait for DocumentComplete state,