Clean up display list 2d canvas flag in tests

TBR=junov@chromium.org,bajones@chromium.org

Bug: 776826
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: Idacc96a19591ae2c5bfc0911243e6a38dcf8a402
Reviewed-on: https://chromium-review.googlesource.com/1052490Reviewed-by: Olivia Lai <xlai@chromium.org>
Commit-Queue: Olivia Lai <xlai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557516}

content/test/gpu/gpu_tests/pixel_test_pages.py

@@ -599,8 +599,7 @@ def NoGpuProcessPages(base_name):
 # arguments.
 def MacSpecificPages(base_name):
   iosurface_2d_canvas_args = [
-    '--enable-accelerated-2d-canvas',
-    '--disable-display-list-2d-canvas']
+    '--enable-accelerated-2d-canvas']
 
   non_chromium_image_args = ['--disable-webgl-image-chromium']
 

third_party/WebKit/LayoutTests/VirtualTestSuites

@@ -12,8 +12,7 @@
   {
     "prefix": "gpu",
     "base": "fast/canvas",
-    "args": ["--enable-accelerated-2d-canvas",
-             "--disable-display-list-2d-canvas"]
+    "args": ["--enable-accelerated-2d-canvas"]
   },
   {
     "prefix": "threaded",