Port perf.py's _LoginToGoogleAccount to chrome_remote_control

tools/gpu/page_sets/top_25.json

Index: tools/gpu/page_sets/top_25.json
diff --git a/tools/gpu/page_sets/top_25.json b/tools/gpu/page_sets/top_25.json
index 354a522da58f2bacff10fb8908e2e256d946a2bc..120ac906200349ca236b10722aeafc52a54210ab 100644
--- a/tools/gpu/page_sets/top_25.json
+++ b/tools/gpu/page_sets/top_25.json
@@ -1,5 +1,6 @@
 {
     "description": "Pages hand-picked for 2012 CrOS scrolling tuning efforts.",
+    "credentials_path": "credentials.json",
     "pages": [

[nduca, 2012/10/02 18:02:10]

isn't there another json in this folder? q3somethingorother? or does that not
point at gmail?

[hartmanng, 2012/10/02 20:18:16]

yeah, it doesn't look like page_sets/Q32012.json needs credentials right now.

         {
             "url": "https://www.google.com/#hl=en&q=barack+obama",
@@ -135,4 +136,4 @@
             "why": "top tech blog"
         }
     ]
-}
+}