[Telemetry] Implement dirty profile generation

tools/perf/profile_creators/small_profile_creator.py

 # Copyright (c) 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 os
 
-from telemetry.core import profile_creator
+from telemetry.core import util
+from telemetry.page import page_runner
 from telemetry.page import page_set
+from telemetry.page import profile_creator
 
 class SmallProfileCreator(profile_creator.ProfileCreator):
   """
   Runs a browser through a series of operations to fill in a small test profile.
   """
 
-  def CreateProfile(self):
-    top_25 = os.path.join(os.path.dirname(__file__),
-                          '..', 'page_sets', 'top_25.json')
-    pages_to_load = page_set.PageSet.FromFile(top_25)
-    tab = self._browser.tabs[0]
-    for page in pages_to_load:
-      tab.Navigate(page.url)
-      tab.WaitForDocumentReadyStateToBeComplete()
-    tab.Disconnect()
+  def __init__(self):
+    super(SmallProfileCreator, self).__init__()
+    top_25 = os.path.join(util.GetBaseDir(), 'page_sets', 'top_25.json')
+    self._page_set = page_set.PageSet.FromFile(top_25)
+
+  def CanRunForPage(self, page):
+    return not page.page_set.pages.index(page)

[tonyg, 2013/08/28 00:09:58]

Recommend a brief comment explaining this.

+
+  def DidNavigateToPage(self, page, tab):
+    for i in xrange(1, len(page.page_set.pages)):
+      t = tab.browser.tabs.New()
+
+      page_state = page_runner.PageState()
+      page_state.PreparePage(page.page_set.pages[i], t)
+      page_state.ImplicitPageNavigation(page.page_set.pages[i], t)
+
+    # Wait for all tabs to load.
+    for i in xrange(len(tab.browser.tabs)):
+      t = tab.browser.tabs[i]
+      t.WaitForDocumentReadyStateToBeComplete()
+
+  def MeasurePage(self, _, tab, results):
+    pass