Always enable FCM on Windows.

content/browser/gpu/gpu_data_manager_impl_private.cc

 // Copyright (c) 2013 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 "content/browser/gpu/gpu_data_manager_impl_private.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 538 matching lines @@
                                              std::string* gl_version) {
   DCHECK(gl_vendor && gl_renderer && gl_version);
 
   *gl_vendor = gpu_info_.gl_vendor;
   *gl_renderer = gpu_info_.gl_renderer;
   *gl_version = gpu_info_.gl_version_string;
 }
 
 void GpuDataManagerImplPrivate::Initialize() {
   TRACE_EVENT0("startup", "GpuDataManagerImpl::Initialize");
-  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  const CommandLine* command_line = CommandLine::ForCurrentProcess();
+#if defined(OS_LINUX) || defined(OS_MACOSX)
+  // TODO(gab): Enable GPU blacklist usage on all the bots
+  // (http://crbug.com/277242).
   if (command_line->HasSwitch(switches::kSkipGpuDataLoading) &&
       !command_line->HasSwitch(switches::kUseGpuInTests))
     return;
+#endif
 
   gpu::GPUInfo gpu_info;
-  {
+  if (command_line->GetSwitchValueASCII(
+          switches::kUseGL) == gfx::kGLImplementationOSMesaName) {
+    // If using the OSMesa GL implementation, use fake vendor and device ids to
+    // make sure it never gets blacklisted. This is better than simply
+    // cancelling GPUInfo gathering as it allows us to proceed with loading the
+    // blacklist below which may have non-device specific entries we want to
+    // apply anyways (e.g., OS version blacklisting).
+    gpu_info.gpu.vendor_id = 0xffff;
+    gpu_info.gpu.device_id = 0xffff;
+
+    // Hardcode these two values otherwise blacklisting rules #12, 55, and 74 in
+    // kSoftwareRenderingListJson result in a positive match as GpuControlList
+    // assumes a match (by design) when a property is required for the
+    // verification yet not present in the GpuInfo.
+    gpu_info.driver_vendor = gfx::kGLImplementationOSMesaName;
+    gpu_info.driver_date = "2013.8";
+  } else {
     TRACE_EVENT0("startup",
       "GpuDataManagerImpl::Initialize:CollectBasicGraphicsInfo");
     gpu::CollectBasicGraphicsInfo(&gpu_info);
   }
 #if defined(ARCH_CPU_X86_FAMILY)
   if (!gpu_info.gpu.vendor_id || !gpu_info.gpu.device_id)
     gpu_info.finalized = true;
 #endif
 
   std::string gpu_blacklist_string;
@@ skipping 670 matching lines @@
 void GpuDataManagerImplPrivate::OnGpuProcessInitFailure() {
   gpu_process_accessible_ = false;
   gpu_info_.finalized = true;
   complete_gpu_info_already_requested_ = true;
   // Some observers might be waiting.
   NotifyGpuInfoUpdate();
 }
 
 }  // namespace content