Add UMA histograms for DirectComposition overlays.

gpu/ipc/service/image_transport_surface_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/ipc/service/image_transport_surface.h"
 
 #include <memory>
 
+#include "base/metrics/histogram_macros.h"
 #include "base/win/windows_version.h"
 #include "gpu/ipc/service/child_window_surface_win.h"
 #include "gpu/ipc/service/direct_composition_surface_win.h"
 #include "gpu/ipc/service/gpu_vsync_provider_win.h"
 #include "gpu/ipc/service/pass_through_image_transport_surface.h"
 #include "gpu/ipc/service/switches.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_surface_egl.h"
@@ skipping 23 matching lines @@
   scoped_refptr<gl::GLSurface> surface;
   if (gl::GetGLImplementation() == gl::kGLImplementationEGLGLES2) {
     std::unique_ptr<gfx::VSyncProvider> vsync_provider;
 
     if (IsGpuVSyncSignalSupported())
       vsync_provider.reset(new GpuVSyncProviderWin(delegate, surface_handle));
     else
       vsync_provider.reset(new gl::VSyncProviderWin(surface_handle));
 
     if (gl::GLSurfaceEGL::IsDirectCompositionSupported()) {
-      if (DirectCompositionSurfaceWin::AreOverlaysSupported()) {
+      bool overlays_supported =
+          DirectCompositionSurfaceWin::AreOverlaysSupported();
+      UMA_HISTOGRAM_BOOLEAN("GPU.DirectComposition.OverlaysSupported",
+                            overlays_supported);
+      if (overlays_supported) {
         scoped_refptr<DirectCompositionSurfaceWin> egl_surface =
             make_scoped_refptr(
                 new DirectCompositionSurfaceWin(delegate, surface_handle));
         if (!egl_surface->Initialize(std::move(vsync_provider)))
           return nullptr;
         surface = egl_surface;
       } else {
         scoped_refptr<ChildWindowSurfaceWin> egl_surface = make_scoped_refptr(
             new ChildWindowSurfaceWin(delegate, surface_handle));
         if (!egl_surface->Initialize(std::move(vsync_provider)))
@@ skipping 10 matching lines @@
     surface = gl::init::CreateViewGLSurface(surface_handle);
     if (!surface)
       return nullptr;
   }
 
   return scoped_refptr<gl::GLSurface>(
       new PassThroughImageTransportSurface(delegate, surface.get()));
 }
 
 }  // namespace gpu