Add an --enable-container-culling commandline flag.

Plumbing for Blink's containerCullingEnabled (experimental Skia culling
for containers).

R=jamesr@chromium.org,piman@chromium.org

Review URL: https://codereview.chromium.org/227593007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@263074 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chromeos/login/chrome_restart_request.cc

@@ -106,6 +106,7 @@ std::string DeriveCommandLine(const GURL& start_url,
     ::switches::kDisableGestureTapHighlight,
     ::switches::kDisableGpuSandbox,
     ::switches::kEnableDeferredFilters,
+    ::switches::kEnableContainerCulling,
     ::switches::kEnableGpuRasterization,
     ::switches::kEnableImplSidePainting,
     ::switches::kEnableLogging,

content/browser/renderer_host/render_view_host_impl.cc

@@ -423,6 +423,8 @@ WebPreferences RenderViewHostImpl::GetWebkitPrefs(const GURL& url) {
       switches::kAcceleratedCanvas2dMSAASampleCount).c_str());
   prefs.deferred_filters_enabled =
       command_line.HasSwitch(switches::kEnableDeferredFilters);
+  prefs.container_culling_enabled =
+      command_line.HasSwitch(switches::kEnableContainerCulling);
   prefs.accelerated_compositing_for_3d_transforms_enabled =
       prefs.accelerated_compositing_for_animation_enabled =
           !command_line.HasSwitch(switches::kDisableAcceleratedLayers);

content/public/common/common_param_traits_macros.h

@@ -150,6 +150,7 @@ IPC_STRUCT_TRAITS_BEGIN(WebPreferences)
   IPC_STRUCT_TRAITS_MEMBER(accelerated_2d_canvas_msaa_sample_count)
   IPC_STRUCT_TRAITS_MEMBER(accelerated_filters_enabled)
   IPC_STRUCT_TRAITS_MEMBER(deferred_filters_enabled)
+  IPC_STRUCT_TRAITS_MEMBER(container_culling_enabled)
   IPC_STRUCT_TRAITS_MEMBER(gesture_tap_highlight_enabled)
   IPC_STRUCT_TRAITS_MEMBER(accelerated_compositing_for_plugins_enabled)
   IPC_STRUCT_TRAITS_MEMBER(accelerated_compositing_for_3d_transforms_enabled)

content/public/common/content_switches.cc

@@ -364,6 +364,9 @@ const char kEnableLCDText[]                 = "enable-lcd-text";
 const char kEnableLayerSquashing[] =
     "enable-layer-squashing";
 
+// Enable experimental container node culling.
+const char kEnableContainerCulling[]        = "enable-container-culling";
+
 // Turns on extremely verbose logging of accessibility events.
 const char kEnableAccessibilityLogging[]    = "enable-accessibility-logging";
 

content/public/common/content_switches.h

@@ -112,6 +112,7 @@ CONTENT_EXPORT extern const char kEnableDeferredFilters[];
 CONTENT_EXPORT extern const char kEnableAcceleratedFixedRootBackground[];
 CONTENT_EXPORT extern const char kEnableAcceleratedOverflowScroll[];
 CONTENT_EXPORT extern const char kEnableLayerSquashing[];
+CONTENT_EXPORT extern const char kEnableContainerCulling[];
 extern const char kEnableAccessibilityLogging[];
 CONTENT_EXPORT extern const char kEnableBeginFrameScheduling[];
 CONTENT_EXPORT extern const char kEnableBrowserPluginForAllViewTypes[];

content/renderer/web_preferences.cc

@@ -231,6 +231,9 @@ void ApplyWebPreferences(const WebPreferences& prefs, WebView* web_view) {
   // Enable deferred filter rendering if requested on the command line.
   settings->setDeferredFiltersEnabled(prefs.deferred_filters_enabled);
 
+  // Enable container culling if requested on the command line.
+  settings->setContainerCullingEnabled(prefs.container_culling_enabled);
+
   // Enable gesture tap highlight if requested on the command line.
   settings->setGestureTapHighlightEnabled(prefs.gesture_tap_highlight_enabled);
 

webkit/common/webpreferences.cc

@@ -72,6 +72,7 @@ WebPreferences::WebPreferences()
       accelerated_2d_canvas_msaa_sample_count(0),
       accelerated_filters_enabled(false),
       deferred_filters_enabled(false),
+      container_culling_enabled(false),
       gesture_tap_highlight_enabled(false),
       accelerated_compositing_for_plugins_enabled(false),
       allow_displaying_insecure_content(true),

webkit/common/webpreferences.h

@@ -120,6 +120,7 @@ struct WEBKIT_COMMON_EXPORT WebPreferences {
   int accelerated_2d_canvas_msaa_sample_count;
   bool accelerated_filters_enabled;
   bool deferred_filters_enabled;
+  bool container_culling_enabled;
   bool gesture_tap_highlight_enabled;
   bool accelerated_compositing_for_plugins_enabled;
   bool allow_displaying_insecure_content;