Completely removed the Extensions3D class (Take 2)

Source/core/html/canvas/WebGLDebugShaders.cpp

Index: Source/core/html/canvas/WebGLDebugShaders.cpp
diff --git a/Source/core/html/canvas/WebGLDebugShaders.cpp b/Source/core/html/canvas/WebGLDebugShaders.cpp
index 8ecb09379d21b3a7e384855d4a206d0c3520f73e..bb790de10d4efc90acdc53eb7165a1f180d21f2a 100644
--- a/Source/core/html/canvas/WebGLDebugShaders.cpp
+++ b/Source/core/html/canvas/WebGLDebugShaders.cpp
@@ -29,7 +29,6 @@
 #include "bindings/v8/ExceptionState.h"
 #include "core/html/canvas/WebGLRenderingContext.h"
 #include "core/html/canvas/WebGLShader.h"
-#include "platform/graphics/Extensions3D.h"
 
 namespace WebCore {
 
@@ -59,13 +58,12 @@ String WebGLDebugShaders::getTranslatedShaderSource(WebGLShader* shader)
         return String();
     if (!m_context->validateWebGLObject("getTranslatedShaderSource", shader))
         return "";
-    return m_context->graphicsContext3D()->extensions()->getTranslatedShaderSourceANGLE(shader->object());
+    return m_context->webGraphicsContext3D()->getTranslatedShaderSourceANGLE(shader->object());
 }
 
 bool WebGLDebugShaders::supported(WebGLRenderingContext* context)
 {
-    Extensions3D* extensions = context->graphicsContext3D()->extensions();
-    return extensions->supports("GL_ANGLE_translated_shader_source");
+    return context->graphicsContext3D()->supportsExtension("GL_ANGLE_translated_shader_source");
 }
 
 const char* WebGLDebugShaders::extensionName()