Rename WATCHLIST definition 'rendering' to 'layout', and add Source/core/layout

WATCHLISTS

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Watchlist Rules
 # Refer: http://dev.chromium.org/developers/contributing-code/watchlists
 
 # IMPORTANT: The regular expression filepath is tested against each path using
 # re.search, so it is not usually necessary to add .*.
 
@@ skipping 121 matching lines @@
     },
     'svg': {
       'filepath': 'Source/core/svg|Source/core/rendering/svg',
     },
     'indexed_db': {
       'filepath': 'Source/modules/indexeddb/' \
                   '|Source/web/.*IDB' \
                   '|LayoutTests/storage/indexeddb' \
                   '|public/platform/.*IDB'
     },
-    'rendering': {
-      'filepath': 'Source/core/rendering'
+    'layout': {
+      'filepath': 'Source/core/layout' \
+                  '|Source/core/rendering'
     },
     'compositing': {
       'filepath': 'Source/core/layout/compositing'
     },
     'layers': {
       'filepath': 'Source/core/page/scrolling/ScrollingCoordinator' \
                   '|Source/platform/graphics/GraphicsLayer' \
                   '|Source/core/layout/Layer'
     },
     "content_security_policy": {
@@ skipping 216 matching lines @@
     'html': [ 'dglazkov+blink@chromium.org', 'blink-reviews-html@chromium.org' ],
     'public_api': [ 'dglazkov+blink@chromium.org' ],
     'workers': [ 'kinuko+worker@chromium.org',
                  'horo+watch@chromium.org',
                  'falken@chromium.org' ],
     'wtf': [ 'mikhail.pozdnyakov@intel.com',
              'aandrey+blink@chromium.org',
              'blink-reviews-wtf@chromium.org' ],
     'indexed_db': ['dgrogan@chromium.org',
                    'jsbell+idb@chromium.org', 'cmumford@chromium.org'],
-    'rendering': [ 'pdr+renderingwatchlist@chromium.org',
-                   'eae+blinkwatch@chromium.org',
-                   'jchaffraix+rendering@chromium.org',
-                   'leviw+renderwatch@chromium.org',
-                   'zoltan@webkit.org',
-                   'blink-reviews-rendering@chromium.org',
-                   'dominik.rottsches@intel.com' ],
+    'layout': [ 'pdr+renderingwatchlist@chromium.org',
+                'eae+blinkwatch@chromium.org',
+                'jchaffraix+rendering@chromium.org',
+                'leviw+renderwatch@chromium.org',
+                'zoltan@webkit.org',
+                'blink-reviews-rendering@chromium.org',
+                'dominik.rottsches@intel.com' ],
     'paint' : [ 'blink-reviews-paint@chromium.org',
                 'slimming-paint-reviews@chromium.org',
                 'dongseong.hwang@intel.com' ],
     'compositing': [ ],
     'content_security_policy': [ 'mkwst+watchlist-csp@chromium.org' ],
     'prerender': [ 'gavinp+prerender@chromium.org',
                    'yoav@yoav.ws' ],
     'preloadScanner': [ 'yoav@yoav.ws' ],
     'scheduler': [ 'scheduler-bugs@chromium.org' ],
     'track': [ 'vcarbune@chromium.org', 'silviapf@chromium.org', 'philipj@opera.com', 'glenn@chromium.org', 'fs@opera.com', 'eric.carlson@apple.com' ],
@@ skipping 49 matching lines @@
     'battery_status': [ 'timvolodine@chromium.org',
                         'mlamouri+watch-blink@chromium.org' ],
     'out_of_process_frames': [ 'dcheng@chromium.org',
                                'mlamouri+watch-blink@chromium.org' ],
     'device_light': [ 'timvolodine@chromium.org',
                       'mlamouri+watch-blink@chromium.org' ],
     'websockets': [ 'tyoshino+watch@chromium.org', 'yhirano+watch@chromium.org' ],
     'xmlhttprequest': [ 'tyoshino+watch@chromium.org' ],
   },
 }