[Telemetry] Implement dirty profile generation

tools/perf/profile_creators/small_profile_creator.py

Index: tools/perf/profile_creators/small_profile_creator.py
diff --git a/tools/perf/profile_creators/small_profile_creator.py b/tools/perf/profile_creators/small_profile_creator.py
index 020f81f3fa466a6041db74c9759ed1be10e94cb3..970f6e774d6069a0e665371648060e1d047d5818 100644
--- a/tools/perf/profile_creators/small_profile_creator.py
+++ b/tools/perf/profile_creators/small_profile_creator.py
@@ -4,20 +4,37 @@
 
 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 true only for the first page, the other pages are opened in new
+    # tabs by DidNavigateToPage().
+    return not page.page_set.pages.index(page)
+
+  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)
+
+      t.WaitForDocumentReadyStateToBeComplete()
+      # Work around crbug.com/258113.
+      util.CloseConnections(t)
+
+  def MeasurePage(self, _, tab, results):
+    pass