Adding pagesets for gmail and plus. Creating endure benchmark

tools/perf/page_sets/gmail_alt_threadlist_conversation.json

Index: tools/perf/page_sets/gmail_alt_threadlist_conversation.json
diff --git a/tools/perf/page_sets/gmail_alt_threadlist_conversation.json b/tools/perf/page_sets/gmail_alt_threadlist_conversation.json
new file mode 100644
index 0000000000000000000000000000000000000000..aae9fe61820c6dd284bffbfd6f06254acda9dbb4
--- /dev/null
+++ b/tools/perf/page_sets/gmail_alt_threadlist_conversation.json
@@ -0,0 +1,31 @@
+{
+  "description": "Chrome Endure test for GMail.",

[dennis_jeffrey, 2013/08/27 20:02:35]

is there a length limit on the description?  Maybe we should add a phrase here
to indicate what scenario is performed, e.g., "Gmail endurance test that
alternates between the threadlist and conversation views."

If you make this change, do the same for the other JSON files in this CL

[edmundyan, 2013/08/27 23:01:48]

I've been putting more detailed descriptions in the "why" for the page (below). 
Should I move that up to description instead?

[dennis_jeffrey, 2013/08/27 23:17:22]

Oh, didn't realize that.  Maybe it's ok as is.  Currently, we need a separate
pageset file for each endure scenario, but in the future if that's no longer the
case, then the pageset "description" should probably be something more general
anyway.

+  "archive_data_file": "../data/gmail_alt_threadlist_conversation.json",
+  "credentials_path": "../data/credentials.json",
+  "user_agent_type": "desktop",
+  "pages": [
+    {
+      "url": "https://mail.google.com/mail/",
+      "why": "Alternate between Inbox and the first email conversation",
+      "credentials": "google",
+      "navigate_steps" : [
+        { "action": "navigate" },
+        { "action": "wait", "condition": "javascript", "javascript": "window.gmonkey !== undefined && document.getElementById('gb') !== null"}

[dennis_jeffrey, 2013/08/27 20:02:35]

add space before the closing } to keep style consistent in this file

[edmundyan, 2013/08/27 23:01:48]

Done.

+      ],
+      "endure": [
+        {
+          "action": "click_element",
+          "xpath": "//span[@email]"
+        },
+        { "action": "wait", "condition": "href_change" },
+        { "action": "wait", "condition": "duration", "seconds": 1 },

[tonyg, 2013/08/27 01:23:02]

I thought we got rid of condition: duration

+        {
+          "action": "click_element",
+          "selector": "a[href=\"https://mail.google.com/mail/u/0/?shva=1#inbox\"]"
+        },
+        { "action": "wait", "condition": "href_change"},

[dennis_jeffrey, 2013/08/27 20:02:35]

add space before the closing } to keep style consistent in this file

+        { "action": "wait", "condition": "duration", "seconds": 1 }
+      ]
+    }
+  ]
+}