ozone: ClientPixmapManager passes VGEM fd from browser to renderer.

ui/ozone/platform/drm/ozone_platform_gbm.cc

 // Copyright 2014 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 "ui/ozone/platform/drm/ozone_platform_gbm.h"
 
 #include <dlfcn.h>
 #include <gbm.h>
 #include <stdlib.h>
 
@@ skipping 28 matching lines @@
 #include "ui/ozone/public/ozone_platform.h"
 #include "ui/ozone/public/ozone_switches.h"
 
 #if defined(USE_XKBCOMMON)
 #include "ui/events/ozone/layout/xkb/xkb_evdev_codes.h"
 #include "ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine.h"
 #else
 #include "ui/events/ozone/layout/stub/stub_keyboard_layout_engine.h"
 #endif
 
+#if defined(USE_VGEM_MAP)
+#include <fcntl.h>
+#endif
+
 namespace ui {
 
 namespace {
 
 class GlApiLoader {
  public:
   GlApiLoader()
       : glapi_lib_(dlopen("libglapi.so.0", RTLD_LAZY | RTLD_GLOBAL)) {}
 
   ~GlApiLoader() {
@@ skipping 83 matching lines @@
         new DrmWindowHost(delegate, bounds, gpu_platform_support_host_.get(),
                           event_factory_ozone_.get(), cursor_.get(),
                           window_manager_.get(), display_manager_.get()));
     platform_window->Initialize();
     return platform_window.Pass();
   }
   scoped_ptr<NativeDisplayDelegate> CreateNativeDisplayDelegate() override {
     return make_scoped_ptr(
         new DrmNativeDisplayDelegate(display_manager_.get()));
   }
+  base::ScopedFD OpenClientNativePixmapDevice() const override {
+#if defined(USE_VGEM_MAP)
+    static const char kVgemPath[] = "/dev/dri/renderD129";
+    base::ScopedFD vgem_fd(open(kVgemPath, O_RDWR | O_CLOEXEC));
+    DCHECK(vgem_fd.is_valid()) << "Failed to open: " << kVgemPath;
+    return vgem_fd;
+#endif
+    return base::ScopedFD();
+  }
   void InitializeUI() override {
     device_manager_ = CreateDeviceManager();
     window_manager_.reset(new DrmWindowHostManager());
     cursor_.reset(new DrmCursor(window_manager_.get()));
 #if defined(USE_XKBCOMMON)
     KeyboardLayoutEngineManager::SetKeyboardLayoutEngine(make_scoped_ptr(
         new XkbKeyboardLayoutEngine(xkb_evdev_code_converter_)));
 #else
     KeyboardLayoutEngineManager::SetKeyboardLayoutEngine(
         make_scoped_ptr(new StubKeyboardLayoutEngine()));
@@ skipping 65 matching lines @@
 OzonePlatform* CreateOzonePlatformGbm() {
   base::CommandLine* cmd = base::CommandLine::ForCurrentProcess();
 #if defined(USE_MESA_PLATFORM_NULL)
   // Only works with surfaceless.
   cmd->AppendSwitch(switches::kOzoneUseSurfaceless);
 #endif
   return new OzonePlatformGbm(cmd->HasSwitch(switches::kOzoneUseSurfaceless));
 }
 
 }  // namespace ui