Add UMA histogram about what format of swapchain is created for overlays

gpu/ipc/service/direct_composition_surface_win.cc

 // Copyright 2017 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/direct_composition_surface_win.h"
 
 #include <d3d11_1.h>
 #include <dcomptypes.h>
 
 #include "base/memory/ptr_util.h"
@@ skipping 414 matching lines @@
   create_surface_handle_function_(COMPOSITIONOBJECT_ALL_ACCESS, nullptr,
                                   &handle);
   swap_chain_handle_.Set(handle);
 
   // The composition surface handle isn't actually used, but
   // CreateSwapChainForComposition can't create YUY2 swapchains.
   HRESULT hr = media_factory->CreateSwapChainForCompositionSurfaceHandle(
       d3d11_device_.get(), swap_chain_handle_.Get(), &desc, nullptr,
       swap_chain_.Receive());
 
+  bool yuy2_swapchain = true;
+
   if (FAILED(hr)) {
     // This should not be hit in production but is a simple fallback for
     // testing on systems without YUY2 swapchain support.
     DLOG(ERROR) << "YUY2 creation failed with " << std::hex << hr
                 << ". Falling back to BGRA";
     desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
     desc.Flags = 0;
     hr = media_factory->CreateSwapChainForCompositionSurfaceHandle(
         d3d11_device_.get(), swap_chain_handle_.Get(), &desc, nullptr,
         swap_chain_.Receive());
     CHECK(SUCCEEDED(hr));
+    yuy2_swapchain = false;
   } else {
     // This is a sensible default colorspace for most videos.
     // TODO(jbauman): Use correct colorspace.
     base::win::ScopedComPtr<IDXGISwapChain3> swap_chain3;
     swap_chain_.QueryInterface(swap_chain3.Receive());
     hr = swap_chain3->SetColorSpace1(
         DXGI_COLOR_SPACE_YCBCR_STUDIO_G22_LEFT_P709);
     CHECK(SUCCEEDED(hr));
   }
+  UMA_HISTOGRAM_BOOLEAN("GPU.DirectComposition.SwapchainFormat",
+                        yuy2_swapchain);
   out_view_.Reset();
 }
 
 void DCLayerTree::InitVisual(size_t i) {
   DCHECK_GT(visual_info_.size(), i);
   VisualInfo* visual_info = &visual_info_[i];
   if (visual_info->content_visual)
     return;
   DCHECK(!visual_info->clip_visual);
   base::win::ScopedComPtr<IDCompositionVisual2> visual;
@@ skipping 554 matching lines @@
 DirectCompositionSurfaceWin::GetWindowTaskRunnerForTesting() {
   return child_window_.GetTaskRunnerForTesting();
 }
 
 base::win::ScopedComPtr<IDXGISwapChain1>
 DirectCompositionSurfaceWin::GetLayerSwapChainForTesting(size_t index) const {
   return layer_tree_->GetLayerSwapChainForTesting(index);
 }
 
 }  // namespace gpu