Implement GLX for Ozone X11.

ui/ozone/platform/x11/ozone_platform_x11.cc

Index: ui/ozone/platform/x11/ozone_platform_x11.cc
diff --git a/ui/ozone/platform/x11/ozone_platform_x11.cc b/ui/ozone/platform/x11/ozone_platform_x11.cc
index 742bda3f490723de86a77e7bb936e9db2c444152..b301951fc1de0a619e7385b1bb68e01e3a0c2ebe 100644
--- a/ui/ozone/platform/x11/ozone_platform_x11.cc
+++ b/ui/ozone/platform/x11/ozone_platform_x11.cc
@@ -95,7 +95,8 @@ class OzonePlatformX11 : public OzonePlatform {
 
   void InitializeUI() override {
     window_manager_.reset(new X11WindowManagerOzone);
-    event_source_.reset(new X11EventSourceLibevent(gfx::GetXDisplay()));
+    if (!event_source_)
+      event_source_.reset(new X11EventSourceLibevent(gfx::GetXDisplay()));
     overlay_manager_.reset(new StubOverlayManager());
     input_controller_ = CreateStubInputController();
     cursor_factory_ozone_.reset(new X11CursorFactoryOzone());
@@ -103,6 +104,8 @@ class OzonePlatformX11 : public OzonePlatform {
   }
 
   void InitializeGPU() override {
+    if (!event_source_)
+      event_source_.reset(new X11EventSourceLibevent(gfx::GetXDisplay()));
     surface_factory_ozone_.reset(new X11SurfaceFactory());
     gpu_platform_support_.reset(CreateStubGpuPlatformSupport());
   }
@@ -110,7 +113,6 @@ class OzonePlatformX11 : public OzonePlatform {
  private:
   // Objects in the Browser process.
   std::unique_ptr<X11WindowManagerOzone> window_manager_;
-  std::unique_ptr<X11EventSourceLibevent> event_source_;
   std::unique_ptr<OverlayManagerOzone> overlay_manager_;
   std::unique_ptr<InputController> input_controller_;
   std::unique_ptr<X11CursorFactoryOzone> cursor_factory_ozone_;
@@ -120,6 +122,9 @@ class OzonePlatformX11 : public OzonePlatform {
   std::unique_ptr<X11SurfaceFactory> surface_factory_ozone_;
   std::unique_ptr<GpuPlatformSupport> gpu_platform_support_;
 
+  // Objects in both Browser and GPU process.
+  std::unique_ptr<X11EventSourceLibevent> event_source_;
+
   DISALLOW_COPY_AND_ASSIGN(OzonePlatformX11);
 };