Adding a test for measuring memory usage.

tools/telemetry/telemetry/page_test.py

Index: tools/telemetry/telemetry/page_test.py
diff --git a/tools/telemetry/telemetry/page_test.py b/tools/telemetry/telemetry/page_test.py
index 2d4d24fd97c3b1a19e3634133523b2da57fd9db8..26fba5d0e8614dc56a4fbefac4a5543b449e968a 100644
--- a/tools/telemetry/telemetry/page_test.py
+++ b/tools/telemetry/telemetry/page_test.py
@@ -38,10 +38,18 @@ class PageTest(object):
     """Override to add test-specific options to the BrowserOptions object"""
     pass
 
+  def CustomizeBrowserOptionsForPageSet(self, ps, options):
+    """Override to add options specific for the given test and page set."""
+    pass
+
   def SetUpBrowser(self, browser):
     """Override to customize the browser right after it has launched."""
     pass
 
+  def CanRunForPage(self, page): #pylint: disable=W0613
+    """Override to customize if the test can be ran for the given page."""
+    return True
+
   def Run(self, options, page, tab, results):
     self.options = options
     try: