Moved the majority of WebGL functionality into WebGLRenderingContextBase

Source/core/html/canvas/ANGLEInstancedArrays.cpp

Index: Source/core/html/canvas/ANGLEInstancedArrays.cpp
diff --git a/Source/core/html/canvas/ANGLEInstancedArrays.cpp b/Source/core/html/canvas/ANGLEInstancedArrays.cpp
index 5633111232d6e8f20aea07977186fcfb4bf021d4..6f25068e82b886294f8317e24b294e6fd30483d6 100644
--- a/Source/core/html/canvas/ANGLEInstancedArrays.cpp
+++ b/Source/core/html/canvas/ANGLEInstancedArrays.cpp
@@ -32,12 +32,12 @@
 
 #include "core/html/canvas/ANGLEInstancedArrays.h"
 
-#include "core/html/canvas/WebGLRenderingContext.h"
+#include "core/html/canvas/WebGLRenderingContextBase.h"
 #include "core/platform/graphics/Extensions3D.h"
 
 namespace WebCore {
 
-ANGLEInstancedArrays::ANGLEInstancedArrays(WebGLRenderingContext* context)
+ANGLEInstancedArrays::ANGLEInstancedArrays(WebGLRenderingContextBase* context)
     : WebGLExtension(context)
 {
     ScriptWrappable::init(this);
@@ -53,12 +53,12 @@ WebGLExtension::ExtensionName ANGLEInstancedArrays::getName() const
     return ANGLEInstancedArraysName;
 }
 
-PassRefPtr<ANGLEInstancedArrays> ANGLEInstancedArrays::create(WebGLRenderingContext* context)
+PassRefPtr<ANGLEInstancedArrays> ANGLEInstancedArrays::create(WebGLRenderingContextBase* context)
 {
     return adoptRef(new ANGLEInstancedArrays(context));
 }
 
-bool ANGLEInstancedArrays::supported(WebGLRenderingContext* context)
+bool ANGLEInstancedArrays::supported(WebGLRenderingContextBase* context)
 {
     Extensions3D* extensions = context->graphicsContext3D()->getExtensions();
     return extensions->supports("GL_ANGLE_instanced_arrays");