Add perf tests for starting Chrome with URL

tools/telemetry/telemetry/page/page_runner.py

Index: tools/telemetry/telemetry/page/page_runner.py
diff --git a/tools/telemetry/telemetry/page/page_runner.py b/tools/telemetry/telemetry/page/page_runner.py
index 4d86f62b4ef7d8b059f13463294634c3641d1848..b7b2ca0189ba029de7ad7f4ebaf307e9ce808e6e 100644
--- a/tools/telemetry/telemetry/page/page_runner.py
+++ b/tools/telemetry/telemetry/page/page_runner.py
@@ -211,6 +211,11 @@ def _PrepareAndRunPage(test, page_set, expectations, finder_options,
   tries = 3
   while tries:
     try:
+      if test.AlwaysRestartBrowserForEachPage():
+        # If we are restarting the browser for each page customize the per page
+        # options just before starting the browser

[jeremy, 2013/12/17 11:29:44]

nit: period

[aberent, 2013/12/17 17:31:27]

Done.

+        test.CustomizeBrowserOptionsForPage(page,
+                                            possible_browser.finder_options)
       state.StartBrowser(test, page_set, page, possible_browser,
                          credentials_path, page.archive_path)
 
@@ -237,7 +242,7 @@ def _PrepareAndRunPage(test, page_set, expectations, finder_options,
       if finder_options.profiler:
         state.StopProfiling()
 
-      if test.NeedsBrowserRestartAfterEachRun(state.browser):
+      if test.NeedsBrowserRestartBeforeNextPage(state.browser):
         state.StopBrowser()
 
       break
@@ -298,8 +303,14 @@ def Run(test, page_set, expectations, finder_options):
   if page_set.user_agent_type:
     browser_options.browser_user_agent_type = page_set.user_agent_type
 
-  for page in pages:
-    test.CustomizeBrowserOptionsForPage(page, possible_browser.finder_options)
+  if not test.AlwaysRestartBrowserForEachPage():
+    # If we are restarting the browser for each page then we want to
+    # customize the browser options for one page at a time.
+    # If we are only starting the browser once then customize the browser
+    # options for every page before running any of them.
+    for page in pages:
+      test.CustomizeBrowserOptionsForPage(page,
+                                          possible_browser.finder_options)

[jeremy, 2013/12/17 11:29:44]

Consider changing this to stick/nonsticky command line options with appropriate
comment per offline discussion.

Or on second thoughts, have CustomizeBrowserOptions take the pageset as an
argument - that actually makes more sense to me...

[aberent, 2013/12/17 17:31:27]

I don't think we can do quite this. CustomizeBrowserOptions is overridden in
many of the tests, and we don't want to lose the default behaviour in cases
where it is overridden.

After some experiments the best option I have found is a variation of the
sticky/nonsticky solution. Let me know what you think of the next patch.

   if finder_options.profiler:
     profiler_class = profiler_finder.FindProfiler(finder_options.profiler)
     profiler_class.CustomizeBrowserOptions(possible_browser.browser_type,