telemetry: Add a page set for blink's memory usage measurement

tools/perf/benchmarks/renderer_memory.py

+# Copyright 2015 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.
+
+from core import perf_benchmark
+from measurements import renderer_memory
+import page_sets
+
+
+class RendererMemoryBlinkMemoryMobile(perf_benchmark.PerfBenchmark):
+  """Measure memory consumption on mobile sites on which blink's memory
+  consumption is relatively high."""
+
+  test = renderer_memory.RendererMemory
+  page_set = page_sets.BlinkMemoryMobilePageSet
+
+  @classmethod
+  def Name(cls):
+    return 'renderer_memory.blink_memory_mobile'