Disable IOSurface clearing on OS X 10.9.

ui/gl/test/gl_image_test_template.h

 // Copyright 2015 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.
 
 // This file defines tests that implementations of GLImage should pass in order
 // to be conformant.
 
 #ifndef UI_GL_TEST_GL_IMAGE_TEST_TEMPLATE_H_
 #define UI_GL_TEST_GL_IMAGE_TEST_TEMPLATE_H_
 
 #include <stdint.h>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/stringize_macros.h"
 #include "base/strings/stringprintf.h"
+#include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/buffer_format_util.h"
 #include "ui/gfx/buffer_types.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_helper.h"
 #include "ui/gl/gl_image.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/test/gl_image_test_support.h"
 #include "ui/gl/test/gl_test_helper.h"
 
+#if defined(OS_MACOSX)
+#include "base/mac/mac_util.h"
+#endif
+
 namespace gl {
 namespace {
 
 // Compiles a fragment shader for sampling out of a texture of |size| bound to
 // |target| and checks for compilation errors.
 GLuint LoadFragmentShader(unsigned target, const gfx::Size& size) {
   // clang-format off
   const char kFragmentShader[] = STRINGIZE(
     uniform SamplerType a_texture;
     varying vec2 v_texCoord;
@@ skipping 133 matching lines @@
 REGISTER_TYPED_TEST_CASE_P(GLImageTest, CreateAndDestroy);
 
 template <typename GLImageTestDelegate>
 class GLImageZeroInitializeTest : public GLImageTest<GLImageTestDelegate> {};
 
 // This test verifies that if an uninitialized image is bound to a texture, the
 // result is zero-initialized.
 TYPED_TEST_CASE_P(GLImageZeroInitializeTest);
 
 TYPED_TEST_P(GLImageZeroInitializeTest, ZeroInitialize) {
+#if defined(OS_MACOSX)
+  // This functionality is disabled on Mavericks because it breaks PDF
+  // rendering. https://crbug.com/594343.
+  if (base::mac::IsOSMavericks())
+    return;
+#endif
+
   const gfx::Size image_size(256, 256);
 
   GLuint framebuffer =
       GLTestHelper::SetupFramebuffer(image_size.width(), image_size.height());
   ASSERT_TRUE(framebuffer);
   glBindFramebufferEXT(GL_FRAMEBUFFER, framebuffer);
   glViewport(0, 0, image_size.width(), image_size.height());
 
   // Create an uninitialized image of preferred format.
   scoped_refptr<gl::GLImage> image = this->delegate_.CreateImage(image_size);
@@ skipping 82 matching lines @@
   image->Destroy(true /* have_context */);
 }
 
 // The GLImageCopyTest test case verifies that the GLImage implementation
 // handles CopyTexImage correctly.
 REGISTER_TYPED_TEST_CASE_P(GLImageCopyTest, CopyTexImage);
 
 }  // namespace gl
 
 #endif  // UI_GL_TEST_GL_IMAGE_TEST_TEMPLATE_H_