Revert of Move static GL binding initialization to //ui/gl/init.

ui/gl/gl_implementation_ozone.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 "ui/gl/gl_implementation.h"
-
+#include "base/bind.h"
+#include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context_stub_with_extensions.h"
 #include "ui/gl/gl_egl_api_implementation.h"
 #include "ui/gl/gl_gl_api_implementation.h"
+#include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_implementation_osmesa.h"
 #include "ui/gl/gl_osmesa_api_implementation.h"
+#include "ui/ozone/public/ozone_platform.h"
+#include "ui/ozone/public/surface_factory_ozone.h"
 
 namespace gl {
 
+namespace {
+
+void GL_BINDING_CALL MarshalClearDepthToClearDepthf(GLclampd depth) {
+  glClearDepthf(static_cast<GLclampf>(depth));
+}
+
+void GL_BINDING_CALL MarshalDepthRangeToDepthRangef(GLclampd z_near,
+                                                    GLclampd z_far) {
+  glDepthRangef(static_cast<GLclampf>(z_near), static_cast<GLclampf>(z_far));
+}
+
+}  // namespace
+
 void GetAllowedGLImplementations(std::vector<GLImplementation>* impls) {
   impls->push_back(kGLImplementationEGLGLES2);
   impls->push_back(kGLImplementationOSMesaGL);
 }
 
+bool InitializeStaticGLBindings(GLImplementation implementation) {
+  // Prevent reinitialization with a different implementation. Once the gpu
+  // unit tests have initialized with kGLImplementationMock, we don't want to
+  // later switch to another GL implementation.
+  DCHECK_EQ(kGLImplementationNone, GetGLImplementation());
+  ui::OzonePlatform::InitializeForGPU();
+
+  switch (implementation) {
+    case kGLImplementationOSMesaGL:
+      return InitializeStaticGLBindingsOSMesaGL();
+    case kGLImplementationEGLGLES2:
+      if (!ui::OzonePlatform::GetInstance()
+               ->GetSurfaceFactoryOzone()
+               ->LoadEGLGLES2Bindings(base::Bind(&AddGLNativeLibrary),
+                                      base::Bind(&SetGLGetProcAddressProc)))
+        return false;
+      SetGLImplementation(kGLImplementationEGLGLES2);
+      InitializeStaticGLBindingsGL();
+      InitializeStaticGLBindingsEGL();
+
+      // These two functions take single precision float rather than double
+      // precision float parameters in GLES.
+      ::gl::g_driver_gl.fn.glClearDepthFn = MarshalClearDepthToClearDepthf;
+      ::gl::g_driver_gl.fn.glDepthRangeFn = MarshalDepthRangeToDepthRangef;
+      break;
+    case kGLImplementationMockGL: {
+      SetGLImplementation(kGLImplementationMockGL);
+      InitializeStaticGLBindingsGL();
+      break;
+    }
+    default:
+      NOTIMPLEMENTED()
+          << "Unsupported GL type for Ozone surface implementation";
+      return false;
+  }
+
+  return true;
+}
+
 bool InitializeDynamicGLBindings(GLImplementation implementation,
                                  GLContext* context) {
   switch (implementation) {
     case kGLImplementationOSMesaGL:
     case kGLImplementationEGLGLES2:
       InitializeDynamicGLBindingsGL(context);
       break;
     case kGLImplementationMockGL:
       if (!context) {
         scoped_refptr<GLContextStubWithExtensions> mock_context(
             new GLContextStubWithExtensions());
         mock_context->SetGLVersionString("3.0");
         InitializeDynamicGLBindingsGL(mock_context.get());
       } else {
         InitializeDynamicGLBindingsGL(context);
       }
       break;
     default:
       return false;
   }
 
   return true;
 }
 
+void InitializeDebugGLBindings() {
+  InitializeDebugGLBindingsEGL();
+  InitializeDebugGLBindingsGL();
+  InitializeDebugGLBindingsOSMESA();
+}
+
+void ClearGLBindings() {
+  ClearGLBindingsEGL();
+  ClearGLBindingsGL();
+  ClearGLBindingsOSMESA();
+  SetGLImplementation(kGLImplementationNone);
+  UnloadGLNativeLibraries();
+}
+
 bool GetGLWindowSystemBindingInfo(GLWindowSystemBindingInfo* info) {
   switch (GetGLImplementation()) {
     case kGLImplementationEGLGLES2:
       return GetGLWindowSystemBindingInfoEGL(info);
     default:
       return false;
   }
   return false;
 }
 
 }  // namespace gl