Add OzoneGLImpl interface.

ui/gl/init/gl_factory_ozone.cc

Index: ui/gl/init/gl_factory_ozone.cc
diff --git a/ui/gl/init/gl_factory_ozone.cc b/ui/gl/init/gl_factory_ozone.cc
index ca5334707356cade0ecd5d16c21c65cfe6388f12..acb8e235fd7ee6b00b37f3fc2f6bf1b3f59538f5 100644
--- a/ui/gl/init/gl_factory_ozone.cc
+++ b/ui/gl/init/gl_factory_ozone.cc
@@ -17,6 +17,7 @@
 #include "ui/gl/gl_surface_egl.h"
 #include "ui/gl/gl_surface_osmesa.h"
 #include "ui/gl/gl_surface_stub.h"
+#include "ui/gl/init/ozone_util.h"
 #include "ui/ozone/public/ozone_platform.h"
 #include "ui/ozone/public/surface_factory_ozone.h"
 
@@ -25,10 +26,6 @@ namespace init {
 
 namespace {
 
-ui::SurfaceFactoryOzone* GetSurfaceFactory() {
-  return ui::OzonePlatform::GetInstance()->GetSurfaceFactoryOzone();
-}
-
 bool HasDefaultImplementation(GLImplementation impl) {
   return impl == kGLImplementationOSMesaGL || impl == kGLImplementationMockGL;
 }
@@ -63,13 +60,16 @@ scoped_refptr<GLSurface> CreateDefaultOffscreenGLSurface(
 }  // namespace
 
 std::vector<GLImplementation> GetAllowedGLImplementations() {
-  std::vector<GLImplementation> impls;
-  impls.push_back(kGLImplementationEGLGLES2);
-  impls.push_back(kGLImplementationOSMesaGL);
-  return impls;
+  ui::OzonePlatform::InitializeForGPU();
+  return GetSurfaceFactory()->GetAllowedGLImplementations();
 }
 
 bool GetGLWindowSystemBindingInfo(GLWindowSystemBindingInfo* info) {
+  if (HasGLOzone())
+    return GetGLOzone()->GetGLWindowSystemBindingInfo(info);
+
+  // TODO(kylechar): This is deprecated and can be removed once all Ozone
+  // platforms use GLOzone instead.
   switch (GetGLImplementation()) {
     case kGLImplementationEGLGLES2:
       return GetGLWindowSystemBindingInfoEGL(info);
@@ -82,6 +82,12 @@ scoped_refptr<GLContext> CreateGLContext(GLShareGroup* share_group,
                                          GLSurface* compatible_surface,
                                          GpuPreference gpu_preference) {
   TRACE_EVENT0("gpu", "gl::init::CreateGLContext");
+
+  if (HasGLOzone()) {
+    return GetGLOzone()->CreateGLContext(share_group, compatible_surface,
+                                         gpu_preference);
+  }
+
   switch (GetGLImplementation()) {
     case kGLImplementationMockGL:
       return scoped_refptr<GLContext>(new GLContextStub(share_group));
@@ -100,9 +106,14 @@ scoped_refptr<GLContext> CreateGLContext(GLShareGroup* share_group,
 scoped_refptr<GLSurface> CreateViewGLSurface(gfx::AcceleratedWidget window) {
   TRACE_EVENT0("gpu", "gl::init::CreateViewGLSurface");
 
+  if (HasGLOzone())
+    return GetGLOzone()->CreateViewGLSurface(window);
+
   if (HasDefaultImplementation(GetGLImplementation()))
     return CreateDefaultViewGLSurface(window);
 
+  // TODO(kylechar): This is deprecated and can be removed once all Ozone
+  // platforms use GLOzone instead.
   return GetSurfaceFactory()->CreateViewGLSurface(GetGLImplementation(),
                                                   window);
 }
@@ -111,6 +122,11 @@ scoped_refptr<GLSurface> CreateSurfacelessViewGLSurface(
     gfx::AcceleratedWidget window) {
   TRACE_EVENT0("gpu", "gl::init::CreateSurfacelessViewGLSurface");
 
+  if (HasGLOzone())
+    return GetGLOzone()->CreateSurfacelessViewGLSurface(window);
+
+  // TODO(kylechar): This is deprecated and can be removed once all Ozone
+  // platforms use GLOzone instead.
   return GetSurfaceFactory()->CreateSurfacelessViewGLSurface(
       GetGLImplementation(), window);
 }
@@ -118,9 +134,14 @@ scoped_refptr<GLSurface> CreateSurfacelessViewGLSurface(
 scoped_refptr<GLSurface> CreateOffscreenGLSurface(const gfx::Size& size) {
   TRACE_EVENT0("gpu", "gl::init::CreateOffscreenGLSurface");
 
+  if (HasGLOzone())
+    return GetGLOzone()->CreateOffscreenGLSurface(size);
+
   if (HasDefaultImplementation(GetGLImplementation()))
     return CreateDefaultOffscreenGLSurface(size);
 
+  // TODO(kylechar): This is deprecated and can be removed once all Ozone
+  // platforms use GLOzone instead.
   return GetSurfaceFactory()->CreateOffscreenGLSurface(GetGLImplementation(),
                                                        size);
 }