Update from https://crrev.com/304121

gpu/config/gpu_info_collector_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/config/gpu_info_collector.h"
 
 // This has to be included before windows.h.
 #include "third_party/re2/re2/re2.h"
 
 #include <windows.h>
@@ skipping 647 matching lines @@
 
 void MergeGPUInfo(GPUInfo* basic_gpu_info,
                   const GPUInfo& context_gpu_info) {
   DCHECK(basic_gpu_info);
 
   if (context_gpu_info.software_rendering) {
     basic_gpu_info->software_rendering = true;
     return;
   }
 
+  // Track D3D Shader Model (if available)
+  const std::string& shader_version =
+      context_gpu_info.vertex_shader_version;
+
+  // Only gather if this is the first time we're seeing
+  // a non-empty shader version string.
+  if (!shader_version.empty() &&
+      basic_gpu_info->vertex_shader_version.empty()) {
+
+    // Note: do not reorder, used by UMA_HISTOGRAM below
+    enum ShaderModel {
+      SHADER_MODEL_UNKNOWN,
+      SHADER_MODEL_2_0,
+      SHADER_MODEL_3_0,
+      SHADER_MODEL_4_0,
+      SHADER_MODEL_4_1,
+      SHADER_MODEL_5_0,
+      NUM_SHADER_MODELS
+    };
+
+    ShaderModel shader_model = SHADER_MODEL_UNKNOWN;
+
+    if (shader_version == "5.0") {
+      shader_model = SHADER_MODEL_5_0;
+    } else if (shader_version == "4.1") {
+      shader_model = SHADER_MODEL_4_1;
+    } else if (shader_version == "4.0") {
+      shader_model = SHADER_MODEL_4_0;
+    } else if (shader_version == "3.0") {
+      shader_model = SHADER_MODEL_3_0;
+    } else if (shader_version == "2.0") {
+      shader_model = SHADER_MODEL_2_0;
+    }
+
+    UMA_HISTOGRAM_ENUMERATION("GPU.D3DShaderModel",
+                              shader_model,
+                              NUM_SHADER_MODELS);
+  }
+
   MergeGPUInfoGL(basic_gpu_info, context_gpu_info);
 
   basic_gpu_info->dx_diagnostics = context_gpu_info.dx_diagnostics;
 }
 
 }  // namespace gpu