Adding Blink-side support for EXT_shader_texture_lod

Source/core/html/canvas/EXTShaderTextureLOD.cpp

Index: Source/core/html/canvas/EXTShaderTextureLOD.cpp
diff --git a/Source/core/html/canvas/EXTShaderTextureLOD.cpp b/Source/core/html/canvas/EXTShaderTextureLOD.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..d258bef94cfb2b80cbfdd3c8f7afab9ea7379601
--- /dev/null
+++ b/Source/core/html/canvas/EXTShaderTextureLOD.cpp
@@ -0,0 +1,42 @@
+// Copyright 2014 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 "config.h"
+
+#include "core/html/canvas/EXTShaderTextureLOD.h"
+
+namespace WebCore {
+
+EXTShaderTextureLOD::EXTShaderTextureLOD(WebGLRenderingContextBase* context)
+    : WebGLExtension(context)
+{
+    ScriptWrappable::init(this);
+    context->extensionsUtil()->ensureExtensionEnabled("GL_EXT_shader_texture_lod");
+}
+
+EXTShaderTextureLOD::~EXTShaderTextureLOD()
+{
+}
+
+WebGLExtensionName EXTShaderTextureLOD::name() const
+{
+    return EXTShaderTextureLODName;
+}
+
+PassRefPtr<EXTShaderTextureLOD> EXTShaderTextureLOD::create(WebGLRenderingContextBase* context)
+{
+    return adoptRef(new EXTShaderTextureLOD(context));
+}
+
+bool EXTShaderTextureLOD::supported(WebGLRenderingContextBase* context)
+{
+    return context->extensionsUtil()->supportsExtension("GL_EXT_shader_texture_lod");
+}
+
+const char* EXTShaderTextureLOD::extensionName()
+{
+    return "EXT_shader_texture_lod";
+}
+
+} // namespace WebCore