Enable GPU control lists in tests on Windows.

gpu/config/software_rendering_list_json.cc

Index: gpu/config/software_rendering_list_json.cc
diff --git a/gpu/config/software_rendering_list_json.cc b/gpu/config/software_rendering_list_json.cc
index 5256740334385c45d473d88355f934a79e2b6cc1..bd4f1ce1bd1d5fedcc223b84fb79df469c07cfe1 100644
--- a/gpu/config/software_rendering_list_json.cc
+++ b/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": "6.11",
+  "version": "6.12",
   "entries": [
     {
       "id": 1,
@@ -1129,6 +1129,21 @@ LONG_STRING_CONST(
       "features": [
         "accelerated_video_decode"
       ]
+    },
+    {
+      "id": 79,
+      "description": "Disable force compositing mode on all Windows versions prior to Vista.",
+      "cr_bugs": [273920],
+      "os": {
+        "type": "win",
+        "version": {
+          "op": "<",
+          "value": "6.0"
+        }
+      },
+      "features": [
+        "force_compositing_mode"
+      ]
     }
   ]
 }
@@ -1136,4 +1151,3 @@ LONG_STRING_CONST(
 );  // LONG_STRING_CONST macro
 
 }  // namespace gpu
-