Completely removed the Extensions3D class (Take 2)

Source/core/html/canvas/EXTTextureFilterAnisotropic.cpp

Index: Source/core/html/canvas/EXTTextureFilterAnisotropic.cpp
diff --git a/Source/core/html/canvas/EXTTextureFilterAnisotropic.cpp b/Source/core/html/canvas/EXTTextureFilterAnisotropic.cpp
index 231c3c586626049f3fca6544ce0f5f881f07685c..a05bea6a666b609ae3356f70a7e86eb81521fba2 100644
--- a/Source/core/html/canvas/EXTTextureFilterAnisotropic.cpp
+++ b/Source/core/html/canvas/EXTTextureFilterAnisotropic.cpp
@@ -26,7 +26,6 @@
 #include "config.h"
 
 #include "core/html/canvas/EXTTextureFilterAnisotropic.h"
-#include "platform/graphics/Extensions3D.h"
 
 namespace WebCore {
 
@@ -34,7 +33,7 @@ EXTTextureFilterAnisotropic::EXTTextureFilterAnisotropic(WebGLRenderingContext*
     : WebGLExtension(context)
 {
     ScriptWrappable::init(this);
-    context->graphicsContext3D()->extensions()->ensureEnabled("GL_EXT_texture_filter_anisotropic");
+    context->graphicsContext3D()->ensureExtensionEnabled("GL_EXT_texture_filter_anisotropic");
 }
 
 EXTTextureFilterAnisotropic::~EXTTextureFilterAnisotropic()
@@ -53,8 +52,7 @@ PassRefPtr<EXTTextureFilterAnisotropic> EXTTextureFilterAnisotropic::create(WebG
 
 bool EXTTextureFilterAnisotropic::supported(WebGLRenderingContext* context)
 {
-    Extensions3D* extensions = context->graphicsContext3D()->extensions();
-    return extensions->supports("GL_EXT_texture_filter_anisotropic");
+    return context->graphicsContext3D()->supportsExtension("GL_EXT_texture_filter_anisotropic");
 }
 
 const char* EXTTextureFilterAnisotropic::extensionName()