[telemetry] Prototype for specifying page sets using Python imports and Telemetry discovery.

tools/perf/profile_creators/extensions_profile_creator.py

Index: tools/perf/profile_creators/extensions_profile_creator.py
diff --git a/tools/telemetry/telemetry/page/extensions_profile_creator.py b/tools/perf/profile_creators/extensions_profile_creator.py
similarity index 97%
rename from tools/telemetry/telemetry/page/extensions_profile_creator.py
rename to tools/perf/profile_creators/extensions_profile_creator.py
index 2ea15bd3e6909fdc87d53493bd494adcad1fc29b..aed2a068d41383c6c15b75241c61a13467232e30 100644
--- a/tools/telemetry/telemetry/page/extensions_profile_creator.py
+++ b/tools/perf/profile_creators/extensions_profile_creator.py
@@ -13,10 +13,10 @@ import time
 import urllib2
 import zipfile
 
-from telemetry.core import util
-from telemetry.page import page_set
 from telemetry.page import profile_creator
 
+import page_sets
+
 
 def _ExternalExtensionsPath():
   """Returns the OS-dependent path at which to install the extension deployment
@@ -84,8 +84,7 @@ class ExtensionsProfileCreator(profile_creator.ProfileCreator):
 
   def __init__(self):
     super(ExtensionsProfileCreator, self).__init__()
-    typical_25 = os.path.join(util.GetBaseDir(), 'page_sets', 'typical_25.py')
-    self._page_set = page_set.PageSet.FromFile(typical_25)
+    self._page_set = page_sets.Typical25()
 
     # Directory into which the output profile is written.
     self._output_profile_path = None