Always enable FCM on Windows.

content/browser/gpu/gpu_data_manager_impl_private.cc

Index: content/browser/gpu/gpu_data_manager_impl_private.cc
diff --git a/content/browser/gpu/gpu_data_manager_impl_private.cc b/content/browser/gpu/gpu_data_manager_impl_private.cc
index 8491508667d467822926dd89134fa02a7bd4ba48..f55c738d469e0cda162cfa57f1a592f9d4577653 100644
--- a/content/browser/gpu/gpu_data_manager_impl_private.cc
+++ b/content/browser/gpu/gpu_data_manager_impl_private.cc
@@ -556,13 +556,20 @@ void GpuDataManagerImplPrivate::GetGLStrings(std::string* gl_vendor,
 
 void GpuDataManagerImplPrivate::Initialize() {
   TRACE_EVENT0("startup", "GpuDataManagerImpl::Initialize");
-  CommandLine* command_line = CommandLine::ForCurrentProcess();
-  if (command_line->HasSwitch(switches::kSkipGpuDataLoading) &&
-      !command_line->HasSwitch(switches::kUseGpuInTests))
-    return;
+  const CommandLine* command_line = CommandLine::ForCurrentProcess();
 
   gpu::GPUInfo gpu_info;
-  {
+  if (command_line->GetSwitchValueASCII(
+          switches::kUseGL) == gfx::kGLImplementationOSMesaName) {
+    // If using the OSMesa GL implementation, report fake vendor and device
+    // names.
+    gpu_info.gpu.vendor_string = gfx::kGLImplementationOSMesaName;

[Zhenyao Mo, 2013/08/16 16:59:01]

Actually you don't have to fake these data.  The only data you need to supply so
the blacklist logic don't think the GPUInfo is empty is the gpu.vendor_id and
gpu.device_id.  You probably can set both to 0x9999, which I don't think will be
conflicting with any real vendor/device.

[gab, 2013/08/16 17:04:46]

Ah ok, good to know, why is that? (it's not clear to me why that is so I'd like
to know so I can add a comment here for any future reader of this code).

[gab, 2013/08/16 19:42:16]

Done.

+    gpu_info.gpu.device_string = gfx::kGLImplementationOSMesaName;
+    gpu_info.driver_vendor = gfx::kGLImplementationOSMesaName;
+    gpu_info.driver_date = "8-16-2013";
+    gpu_info.gl_vendor = gfx::kGLImplementationOSMesaName;
+    gpu_info.gl_renderer = gfx::kGLImplementationOSMesaName;
+  } else {
     TRACE_EVENT0("startup",
       "GpuDataManagerImpl::Initialize:CollectBasicGraphicsInfo");
     gpu::CollectBasicGraphicsInfo(&gpu_info);