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 1219ee1caf5b0ad59fe1d94f5f23e479e1f6a637..cf53f7deba972a1e521a26032dc90d88bcd08076 100644
--- a/ui/ozone/platform/x11/ozone_platform_x11.cc
+++ b/ui/ozone/platform/x11/ozone_platform_x11.cc
@@ -91,7 +91,8 @@ 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());
@@ -99,13 +100,14 @@ class OzonePlatformX11 : public OzonePlatform {
   }
 
   void InitializeGPU() override {
+    if (!event_source_)
+      event_source_.reset(new X11EventSourceLibevent(gfx::GetXDisplay()));
     surface_factory_ozone_.reset(new X11SurfaceFactory());
   }
 
  private:
-  // Objects in the Browser process.
+  // 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_;
@@ -114,6 +116,9 @@ class OzonePlatformX11 : public OzonePlatform {
   // Objects in the GPU process.
   std::unique_ptr<X11SurfaceFactory> surface_factory_ozone_;
 
+  // Objects in both browser and GPU process.
+  std::unique_ptr<X11EventSourceLibevent> event_source_;
+
   DISALLOW_COPY_AND_ASSIGN(OzonePlatformX11);
 };