Enable GPU thread priority finch flags on Windows by default

In preparation for launching this on stable channel per go/finch101.

Bug: 965778
Change-Id: I244791af79f2ef04b4dbd16f662cf2cc9fa54994
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1949844Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Sunny Sachanandani <sunnyps@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721344}

gpu/config/gpu_finch_features.cc

@@ -72,11 +72,11 @@ const base::Feature kDirectCompositionUnderlays{
 #if defined(OS_WIN)
 // Use a high priority for GPU process on Windows.
 const base::Feature kGpuProcessHighPriorityWin{
-    "GpuProcessHighPriorityWin", base::FEATURE_DISABLED_BY_DEFAULT};
+    "GpuProcessHighPriorityWin", base::FEATURE_ENABLED_BY_DEFAULT};
 #endif
 
 // Use ThreadPriority::DISPLAY for GPU main, viz compositor and IO threads.
-#if defined(OS_ANDROID) || defined(OS_CHROMEOS)
+#if defined(OS_ANDROID) || defined(OS_CHROMEOS) || defined(OS_WIN)
 const base::Feature kGpuUseDisplayThreadPriority{
     "GpuUseDisplayThreadPriority", base::FEATURE_ENABLED_BY_DEFAULT};
 #else

third_party/blink/common/features.cc

@@ -374,7 +374,7 @@ const base::Feature kVerifyHTMLFetchedFromAppCacheBeforeDelay{
 // compositor & IO threads.
 const base::Feature kBlinkCompositorUseDisplayThreadPriority {
   "BlinkCompositorUseDisplayThreadPriority",
-#if defined(OS_ANDROID) || defined(OS_CHROMEOS)
+#if defined(OS_ANDROID) || defined(OS_CHROMEOS) || defined(OS_WIN)
       base::FEATURE_ENABLED_BY_DEFAULT
 #else
       base::FEATURE_DISABLED_BY_DEFAULT