Turn on impl-side painting when --enable-bleeding-edge-rendering-fast-paths is true.

content/browser/gpu/compositor_util.cc

Index: content/browser/gpu/compositor_util.cc
diff --git a/content/browser/gpu/compositor_util.cc b/content/browser/gpu/compositor_util.cc
index 51318ef8624936ecfe2a030d7f5b1503bc761d94..ef6896430d846a79300fe3f7ed8650cf78ad7069 100644
--- a/content/browser/gpu/compositor_util.cc
+++ b/content/browser/gpu/compositor_util.cc
@@ -200,6 +200,9 @@ bool IsImplSidePaintingEnabled() {
     return false;
   else if (command_line.HasSwitch(switches::kEnableImplSidePainting))
     return true;
+  else if (command_line.HasSwitch(
+      switches::kEnableBleedingEdgeRenderingFastPaths))
+    return true;
 
   return IsThreadedCompositingEnabled();
 }