[Telemetry]: Assert that page measurement results don't contain a '.' in their name.

tools/perf/metrics/memory.py

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import sys
 
 from metrics import histogram_util
 from metrics import Metric
 
 _HISTOGRAMS = [
     {'name': 'V8.MemoryExternalFragmentationTotal', 'units': 'percent',
+     'display_name': 'V8_MemoryExternalFragmentationTotal',
      'type': histogram_util.RENDERER_HISTOGRAM},
     {'name': 'V8.MemoryHeapSampleTotalCommitted', 'units': 'kb',
+     'display_name': 'V8_MemoryHeapSampleTotalCommitted',
      'type': histogram_util.RENDERER_HISTOGRAM},
     {'name': 'V8.MemoryHeapSampleTotalUsed', 'units': 'kb',
+     'display_name': 'V8_MemoryHeapSampleTotalUsed',
      'type': histogram_util.RENDERER_HISTOGRAM},
     {'name': 'V8.MemoryHeapSampleMaximumCommitted', 'units': 'kb',
+     'display_name': 'V8_MemoryHeapSampleMaximumCommitted',
      'type': histogram_util.RENDERER_HISTOGRAM},
     {'name': 'Memory.RendererUsed', 'units': 'kb',
+     'display_name': 'Memory_RendererUsed',
      'type': histogram_util.RENDERER_HISTOGRAM},
     {'name': 'Memory.BrowserUsed', 'units': 'kb',
+     'display_name': 'Memory_BrowserUsed',
      'type': histogram_util.BROWSER_HISTOGRAM}]
 
 class MemoryMetric(Metric):
   """MemoryMetric gathers memory statistics from the browser object.
 
   This includes both per-page histogram stats, most about javascript
   memory usage, and overall memory stats from the system for the whole
   test run."""
 
   def __init__(self, browser):
@@ skipping 48 matching lines @@
 
   # Optional argument trace_name is not in base class Metric.
   # pylint: disable=W0221
   def AddResults(self, tab, results, trace_name=None):
     """Add results for this page to the results object."""
     assert self._histogram_delta, 'Must call Stop() first'
     for h in _HISTOGRAMS:
       # Histogram data may not be available
       if h['name'] not in self._histogram_start:
         continue
-      results.Add(h['name'], h['units'], self._histogram_delta[h['name']],
+      results.Add(h['display_name'], h['units'],
+                  self._histogram_delta[h['name']],
                   data_type='unimportant-histogram')
     self._memory_stats = self._browser.memory_stats
     if not self._memory_stats['Browser']:
       return
 
     metric = 'resident_set_size'
     if sys.platform == 'win32':
       metric = 'working_set'
 
     def AddResultsForProcessTypes(process_types_memory, process_type_trace):
@@ skipping 43 matching lines @@
     end_commit_charge = self._memory_stats['SystemCommitCharge']
     commit_charge_difference = end_commit_charge - self._start_commit_charge
     results.Add(trace_name or 'commit_charge', 'kb',
                 commit_charge_difference,
                 chart_name='commit_charge',
                 data_type='unimportant')
     results.Add(trace_name or 'processes', 'count',
                 self._memory_stats['ProcessCount'],
                 chart_name='processes',
                 data_type='unimportant')