[Android] Add timeout_scale for Lollipop Low-end Tester.

testing/buildbot/chromium.android.json

Index: testing/buildbot/chromium.android.json
diff --git a/testing/buildbot/chromium.android.json b/testing/buildbot/chromium.android.json
index 6075194d8e43269a26f52c3acc84edf1d5780fb4..48777e58c8d19d179ac98fa18e5122ec1d370bcb 100644
--- a/testing/buildbot/chromium.android.json
+++ b/testing/buildbot/chromium.android.json
@@ -1388,24 +1388,27 @@
     ],
     "instrumentation_tests": [
       {
-        "test": "android_webview_test_apk"
+        "test": "android_webview_test_apk",
+        "timeout_scale": 2
       },
       {
-        "apk_under_test": "Blimp.apk",
         "override_compile_targets": [
           "blimp_test_apk"
         ],
         "test": "blimp_test_apk",
-        "test_apk": "BlimpTest.apk"
+        "timeout_scale": 2
       },
       {
-        "test": "chrome_public_test_apk"
+        "test": "chrome_public_test_apk",
+        "timeout_scale": 2
       },
       {
-        "test": "chrome_sync_shell_test_apk"
+        "test": "chrome_sync_shell_test_apk",
+        "timeout_scale": 2
       },
       {
-        "test": "content_shell_test_apk"
+        "test": "content_shell_test_apk",
+        "timeout_scale": 2
       }
     ]
   },