Delete obsolete GPU rasterization content whitelist code

This deletes code that was previously used for deciding if the
expanded content whitelist for GPU rasterization should be used.
Blink now uses the expanded whitelist by default (that is,
WebSettings::setUseExpandedHeuristicsForGpuRasterization is
now a no-op), so this code is no longer needed.

BUG=404866

Review URL: https://codereview.chromium.org/496503002

Cr-Commit-Position: refs/heads/master@{#291744}

content/browser/gpu/gpu_data_manager_impl_private.cc

@@ -699,12 +699,6 @@ void GpuDataManagerImplPrivate::UpdateRendererWebPrefs(
           switches::kDisableAcceleratedVideoDecode)) {
     prefs->pepper_accelerated_video_decode_enabled = true;
   }
-
-  if (!IsFeatureBlacklisted(
-          gpu::GPU_FEATURE_TYPE_GPU_RASTERIZATION_EXPANDED_HEURISTICS) ||
-      base::FieldTrialList::FindFullName(
-          "GpuRasterizationExpandedContentWhitelist") == "Enabled")
-    prefs->use_expanded_heuristics_for_gpu_rasterization = true;
 }
 
 void GpuDataManagerImplPrivate::DisableHardwareAcceleration() {

content/public/common/common_param_traits_macros.h

@@ -169,7 +169,6 @@ IPC_STRUCT_TRAITS_BEGIN(content::WebPreferences)
   IPC_STRUCT_TRAITS_MEMBER(supports_multiple_windows)
   IPC_STRUCT_TRAITS_MEMBER(viewport_enabled)
   IPC_STRUCT_TRAITS_MEMBER(viewport_meta_enabled)
-  IPC_STRUCT_TRAITS_MEMBER(use_expanded_heuristics_for_gpu_rasterization)
   IPC_STRUCT_TRAITS_MEMBER(main_frame_resizes_are_orientation_changes)
   IPC_STRUCT_TRAITS_MEMBER(initialize_at_minimum_page_scale)
   IPC_STRUCT_TRAITS_MEMBER(smart_insert_delete_enabled)

content/public/common/web_preferences.cc

@@ -123,7 +123,6 @@ WebPreferences::WebPreferences()
       supports_multiple_windows(true),
       viewport_enabled(false),
       viewport_meta_enabled(false),
-      use_expanded_heuristics_for_gpu_rasterization(false),
       main_frame_resizes_are_orientation_changes(false),
       initialize_at_minimum_page_scale(true),
 #if defined(OS_MACOSX)

content/public/common/web_preferences.h

@@ -133,7 +133,6 @@ struct CONTENT_EXPORT WebPreferences {
   bool supports_multiple_windows;
   bool viewport_enabled;
   bool viewport_meta_enabled;
-  bool use_expanded_heuristics_for_gpu_rasterization;
   bool main_frame_resizes_are_orientation_changes;
   bool initialize_at_minimum_page_scale;
   bool smart_insert_delete_enabled;

content/renderer/render_view_impl.cc

@@ -1061,8 +1061,6 @@ void RenderView::ApplyWebPreferences(const WebPreferences& prefs,
   settings->setViewportEnabled(prefs.viewport_enabled);
   settings->setLoadWithOverviewMode(prefs.initialize_at_minimum_page_scale);
   settings->setViewportMetaEnabled(prefs.viewport_meta_enabled);
-  settings->setUseExpandedHeuristicsForGpuRasterization(
-      prefs.use_expanded_heuristics_for_gpu_rasterization);
   settings->setMainFrameResizesAreOrientationChanges(
       prefs.main_frame_resizes_are_orientation_changes);
 

gpu/config/gpu_blacklist.cc

@@ -38,9 +38,6 @@ GpuBlacklist* GpuBlacklist::Create() {
                             GPU_FEATURE_TYPE_PANEL_FITTING);
   list->AddSupportedFeature("gpu_rasterization",
                             GPU_FEATURE_TYPE_GPU_RASTERIZATION);
-  list->AddSupportedFeature(
-      "gpu_rasterization_expanded_heuristics",
-      GPU_FEATURE_TYPE_GPU_RASTERIZATION_EXPANDED_HEURISTICS);
   list->set_supports_feature_type_all(true);
   return list;
 }

gpu/config/gpu_blacklist_unittest.cc

@@ -128,9 +128,4 @@ GPU_BLACKLIST_FEATURE_TEST(GpuRasterization,
                            "gpu_rasterization",
                            GPU_FEATURE_TYPE_GPU_RASTERIZATION)
 
-GPU_BLACKLIST_FEATURE_TEST(
-    GpuRasterizationExpandedHeuristics,
-    "gpu_rasterization_expanded_heuristics",
-    GPU_FEATURE_TYPE_GPU_RASTERIZATION_EXPANDED_HEURISTICS)
-
 }  // namespace gpu

gpu/config/gpu_feature_type.h

@@ -21,7 +21,6 @@ enum GpuFeatureType {
   GPU_FEATURE_TYPE_PANEL_FITTING,
   GPU_FEATURE_TYPE_FLASH_STAGE3D_BASELINE,
   GPU_FEATURE_TYPE_GPU_RASTERIZATION,
-  GPU_FEATURE_TYPE_GPU_RASTERIZATION_EXPANDED_HEURISTICS,
   NUMBER_OF_GPU_FEATURE_TYPES
 };
 

gpu/config/software_rendering_list_json.cc

@@ -18,7 +18,7 @@ const char kSoftwareRenderingListJson[] = LONG_STRING_CONST(
 {
   "name": "software rendering list",
   // Please update the version number whenever you change this file.
-  "version": "9.3",
+  "version": "9.4",
   "entries": [
     {
       "id": 1,
@@ -1084,25 +1084,6 @@ LONG_STRING_CONST(
         "gpu_rasterization"
       ]
     },
-    {
-      "id": 98,
-      "description": "Whitelist for using GPU rasterization for a broader set of content",
-      "cr_bugs": [399306],
-      "exceptions": [
-        {
-          "os": {
-            "type": "android",
-            "version": {
-              "op": ">=",
-              "value": "4.4.99"
-            }
-          }
-        }
-      ],
-      "features": [
-        "gpu_rasterization_expanded_heuristics"
-      ]
-    },
     {
       "id": 99,
       "description": "GPU rasterization is blacklisted on non-Android",