[Telemetry] Reorganize everything.

tools/telemetry/telemetry/page/multi_page_benchmark.py

 # Copyright (c) 2012 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 telemetry import page_test
+from telemetry.page import page_test
 
 class MeasurementFailure(page_test.Failure):
   """Exception that can be thrown from MeasurePage to indicate an undesired but
   designed-for problem."""
   pass
 
 # TODO(nduca): Rename to page_benchmark
 class MultiPageBenchmark(page_test.PageTest):
   """Glue code for running a benchmark across a set of pages.
 
@@ skipping 44 matching lines @@
     benchmark discovers what values it can report as it goes, and those values
     may vary from page to page, you need to override this function and return
     False. Output will not appear in this mode until the entire pageset has
     run."""
     return True
 
   def MeasurePage(self, page, tab, results):
     """Override to actually measure the page's performance.
 
     page is a page_set.Page
-    tab is an instance of telemetry.Tab
+    tab is an instance of telemetry.core.Tab
 
     Should call results.Add(name, units, value) for each result, or raise an
     exception on failure. The name and units of each Add() call must be
     the same across all iterations. The name 'url' must not be used.
 
     Prefer field names that are in accordance with python variable style. E.g.
     field_name.
 
     Put together:
 
        def MeasurePage(self, page, tab, results):
          res = tab.EvaluateJavaScript('2+2')
          if res != 4:
            raise Exception('Oh, wow.')
          results.Add('two_plus_two', 'count', res)
     """
     raise NotImplementedError()