Merge polymer.py into rendering page sets

Copy polymer.py into the rendering folder and refactor classes to
inherit from RenderingStory. Leave original polymer.py in page_sets
folder for now because key_hit_test_cases needs it.

Bug: 849392
Change-Id: I356f9887849cffb6f576f4c0d6567e3f185e818d
Reviewed-on: https://chromium-review.googlesource.com/1087649Reviewed-by: Ned Nguyen <nednguyen@google.com>
Commit-Queue: Amy Qiu <amyqiu@google.com>
Cr-Commit-Position: refs/heads/master@{#564905}

tools/perf/expectations.config

@@ -159,6 +159,15 @@ crbug.com/829499 [ Android_One ] rendering.mobile/web_animations_many_keyframes
 crbug.com/840964 [ Nexus_5X ] rendering.mobile/web_animations_many_keyframes [ Skip ]
 crbug.com/750833 [ Android_Webview ] rendering.mobile/flickr_scroll [ Skip ]
 crbug.com/653993 [ Android_Webview ] rendering.mobile/maps_perf_test [ Skip ]
+[ All ] rendering.mobile/core_scroll_header_panel [ Skip ] # Polymer test, needs to be modernized.
+[ All ] rendering.mobile/paper_button [ Skip ] # Polymer test, needs to be modernized.
+[ All ] rendering.mobile/paper_calculator [ Skip ] # Polymer test, needs to be modernized.
+[ All ] rendering.mobile/paper_checkbox [ Skip ] # Polymer test, needs to be modernized.
+[ All ] rendering.mobile/paper_fab [ Skip ] # Polymer test, needs to be modernized.
+[ All ] rendering.mobile/paper_icon_button [ Skip ] # Polymer test, needs to be modernized.
+[ All ] rendering.mobile/paper_shadow [ Skip ] # Polymer test, needs to be modernized.
+[ All ] rendering.mobile/paper_tabs [ Skip ] # Polymer test, needs to be modernized.
+[ All ] rendering.mobile/paper_toggle_button [ Skip ] # Polymer test, needs to be modernized.
 
 # Benchmark: smoothness.gpu_rasterization.polymer
 [ All ] smoothness.gpu_rasterization.polymer/* [ Skip ] # Test needs to be modernized.

tools/perf/page_sets/data/rendering_mobile.json

@@ -563,6 +563,33 @@
         },
         "many_planets_deep": {
             "DEFAULT": "tough_webgl_cases_006.wprgo"
+        },
+	"core_scroll_header_panel": {
+            "DEFAULT": "polymer_001.wprgo"
+        },
+        "paper_button": {
+            "DEFAULT": "polymer_001.wprgo"
+        },
+        "paper_calculator": {
+            "DEFAULT": "polymer_001.wprgo"
+        },
+        "paper_checkbox": {
+            "DEFAULT": "polymer_001.wprgo"
+        },
+        "paper_fab": {
+            "DEFAULT": "polymer_001.wprgo"
+        },
+        "paper_icon_button": {
+            "DEFAULT": "polymer_001.wprgo"
+        },
+        "paper_shadow": {
+            "DEFAULT": "polymer_001.wprgo"
+        },
+        "paper_tabs": {
+            "DEFAULT": "polymer_001.wprgo"
+        },
+        "paper_toggle_button": {
+            "DEFAULT": "polymer_001.wprgo"
         }
     },
     "description": "Describes the Web Page Replay archives for a story set. Don't edit by hand! Use record_wpr for updating.",