Add a command-line switch --enable-per-tile-painting.

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 76493d31c4c5107663476bfea8bc443f271e972e..2573f63e21dc94697eda142f9c7d00b0e10e4e3f 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -152,15 +152,15 @@ const Experiment kExperiments[] = {
     SINGLE_VALUE_TYPE(switches::kShowCompositedLayerBorders)
   },
   {
-    "accelerated-drawing",
-    IDS_FLAGS_ACCELERATED_DRAWING_NAME,
-    IDS_FLAGS_ACCELERATED_DRAWING_DESCRIPTION,
+    "accelerated-painting",
+    IDS_FLAGS_ACCELERATED_PAINTING_NAME,
+    IDS_FLAGS_ACCELERATED_PAINTING_DESCRIPTION,
 #if defined(USE_SKIA)
     kOsAll,
 #else
     0,
 #endif
-    SINGLE_VALUE_TYPE(switches::kEnableAcceleratedDrawing)
+    SINGLE_VALUE_TYPE(switches::kEnableAcceleratedPainting)
   },
   {
     "show-fps-counter",
@@ -429,6 +429,17 @@ const Experiment kExperiments[] = {
     kOsMac | kOsWin,
     SINGLE_VALUE_TYPE(switches::kEnableGamepad)
   },
+  {
+    "per-tile-painting",
+    IDS_FLAGS_PER_TILE_PAINTING_NAME,
+    IDS_FLAGS_PER_TILE_PAINTING_DESCRIPTION,
+#if defined(USE_SKIA)
+    kOsAll,
+#else
+    0,
+#endif
+    SINGLE_VALUE_TYPE(switches::kEnablePerTilePainting)
+  },
 };
 
 const Experiment* experiments = kExperiments;