AppListController refactoring part 1: AppListShower implementation.

testing/buildbot/chromium.win.json

Index: testing/buildbot/chromium.win.json
diff --git a/testing/buildbot/chromium.win.json b/testing/buildbot/chromium.win.json
index 118d80dc759331214c26a505d2033482654c292f..f35f59a05ebf5d033be3b8ff6eda4fec9c6c8a5f 100644
--- a/testing/buildbot/chromium.win.json
+++ b/testing/buildbot/chromium.win.json
@@ -11,6 +11,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "app_list_shower_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "app_list_unittests"
       },
       {
@@ -430,6 +436,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "app_list_shower_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "app_list_unittests"
       },
       {
@@ -865,6 +877,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "app_list_shower_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "app_list_unittests"
       },
       {
@@ -1283,6 +1301,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "app_list_shower_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "app_list_unittests"
       },
       {
@@ -2064,6 +2088,7 @@
     "additional_compile_targets": [
       "accessibility_unittests",
       "app_list_unittests",
+      "app_list_shower_unittests",
       "app_shell_unittests",
       "ash_shell_with_content",
       "ash_unittests",