Expedite discovery of primary DRM device.

content/browser/gpu/gpu_process_host.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 "content/browser/gpu/gpu_process_host.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <list>
@@ skipping 64 matching lines @@
 
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
 #include "content/common/sandbox_win.h"
 #include "sandbox/win/src/sandbox_policy.h"
 #include "ui/gfx/switches.h"
 #include "ui/gfx/win/rendering_window_manager.h"
 #endif
 
 #if defined(USE_OZONE)
+#include "ui/ozone/public/gpu_platform_support_host.h"
+#include "ui/ozone/public/ozone_platform.h"
 #include "ui/ozone/public/ozone_switches.h"
 #endif
 
 #if defined(USE_X11) && !defined(OS_CHROMEOS)
 #include "ui/gfx/x/x11_switches.h"  // nogncheck
 #endif
 
 #if defined(OS_MACOSX) || defined(OS_ANDROID)
 #include "gpu/ipc/common/gpu_surface_tracker.h"
 #endif
@@ skipping 83 matching lines @@
                            bool force_create,
                            IPC::Message* message) {
   GpuProcessHost* host = GpuProcessHost::Get(kind, force_create);
   if (host) {
     host->Send(message);
   } else {
     delete message;
   }
 }
 
+#if defined(USE_OZONE)
+void SendGpuProcessMessageByHostId(int host_id, IPC::Message* message) {
+  GpuProcessHost* host = GpuProcessHost::FromID(host_id);
+  if (host) {
+    host->Send(message);
+  } else {
+    delete message;
+  }
+}
+#endif
+
 // NOTE: changes to this class need to be reviewed by the security team.
 class GpuSandboxedProcessLauncherDelegate
     : public SandboxedProcessLauncherDelegate {
  public:
   GpuSandboxedProcessLauncherDelegate(base::CommandLine* cmd_line,
                                       ChildProcessHost* host)
 #if defined(OS_WIN)
       : cmd_line_(cmd_line) {}
 #elif defined(OS_POSIX)
       : ipc_fd_(host->TakeClientFileDescriptor()) {}
@@ skipping 391 matching lines @@
     in_process_gpu_thread_->StartWithOptions(options);
 
     OnProcessLaunched();  // Fake a callback that the process is ready.
   } else if (!LaunchGpuProcess(&gpu_preferences)) {
     return false;
   }
 
   if (!Send(new GpuMsg_Initialize(gpu_preferences)))
     return false;
 
+#if defined(USE_OZONE)
+  ui::OzonePlatform::GetInstance()

[dnicoara, 2016/11/01 19:00:40]

Is this guaranteed to run before GpuProcessHostUiShim is created?

[hshi1, 2016/11/01 19:06:00]

Yes because GpuProcessHostUiShim::Create() is posted on the UI thread from the
ctor of GpuProcessHost, while GpuProcessHost::Init() is called synchronously on
the IO thread immediately following the ctor of GpuProcessHost in
GpuProcessHost::Get().

+      ->GetGpuPlatformSupportHost()
+      ->OnGpuProcessLaunched(
+          host_id_, BrowserThread::GetTaskRunnerForThread(BrowserThread::IO),
+          base::Bind(&SendGpuProcessMessageByHostId, host_id_));
+#endif
+
   return true;
 }
 
 void GpuProcessHost::RouteOnUIThread(const IPC::Message& message) {
   BrowserThread::PostTask(
       BrowserThread::UI,
       FROM_HERE,
       base::Bind(&RouteToGpuProcessHostUIShimTask, host_id_, message));
 }
 
@@ skipping 557 matching lines @@
   TRACE_EVENT0("gpu", "GpuProcessHost::OnCacheShader");
   ClientIdToShaderCacheMap::iterator iter =
       client_id_to_shader_cache_.find(client_id);
   // If the cache doesn't exist then this is an off the record profile.
   if (iter == client_id_to_shader_cache_.end())
     return;
   iter->second->Cache(GetShaderPrefixKey() + ":" + key, shader);
 }
 
 }  // namespace content