Initial implementation for sharing field trial state (win)

content/browser/gpu/gpu_process_host.cc

Index: content/browser/gpu/gpu_process_host.cc
diff --git a/content/browser/gpu/gpu_process_host.cc b/content/browser/gpu/gpu_process_host.cc
index 367a69d9323fd065203a78416690ba86d09ad846..2438784bbd6ae3bfd9ccd00e328f335af0407714 100644
--- a/content/browser/gpu/gpu_process_host.cc
+++ b/content/browser/gpu/gpu_process_host.cc
@@ -973,8 +973,16 @@ bool GpuProcessHost::LaunchGpuProcess(gpu::GpuPreferences* gpu_preferences) {
 
   base::CommandLine* cmd_line = new base::CommandLine(exe_path);
 #endif
+
   cmd_line->AppendSwitchASCII(switches::kProcessType, switches::kGpuProcess);
+
+#if defined(OS_WIN)
+  field_trial_state_.reset(new base::SharedMemory());
+  BrowserChildProcessHostImpl::CopyFeatureAndFieldTrialFlags(
+    cmd_line, field_trial_state_.get());
+#else
   BrowserChildProcessHostImpl::CopyFeatureAndFieldTrialFlags(cmd_line);
+#endif
 
 #if defined(OS_WIN)
   cmd_line->AppendArg(switches::kPrefetchArgumentGpu);
@@ -1020,6 +1028,7 @@ bool GpuProcessHost::LaunchGpuProcess(gpu::GpuPreferences* gpu_preferences) {
   process_->Launch(
       new GpuSandboxedProcessLauncherDelegate(cmd_line,
                                               process_->GetHost()),
+      field_trial_state_.get(),
       cmd_line,
       true);
   process_launched_ = true;