Moved the majority of WebGL functionality into WebGLRenderingContextBase

Source/core/html/canvas/OESElementIndexUint.cpp

Index: Source/core/html/canvas/OESElementIndexUint.cpp
diff --git a/Source/core/html/canvas/OESElementIndexUint.cpp b/Source/core/html/canvas/OESElementIndexUint.cpp
index 4fa47ed9669748604afbb18f2f0167cd8c4a68ec..1eb94bd7dfbd85ca271e6ded6e5d9b8e3073b3e1 100644
--- a/Source/core/html/canvas/OESElementIndexUint.cpp
+++ b/Source/core/html/canvas/OESElementIndexUint.cpp
@@ -30,7 +30,7 @@
 
 namespace WebCore {
 
-OESElementIndexUint::OESElementIndexUint(WebGLRenderingContext* context)
+OESElementIndexUint::OESElementIndexUint(WebGLRenderingContextBase* context)
     : WebGLExtension(context)
 {
     ScriptWrappable::init(this);
@@ -46,12 +46,12 @@ WebGLExtension::ExtensionName OESElementIndexUint::getName() const
     return OESElementIndexUintName;
 }
 
-PassRefPtr<OESElementIndexUint> OESElementIndexUint::create(WebGLRenderingContext* context)
+PassRefPtr<OESElementIndexUint> OESElementIndexUint::create(WebGLRenderingContextBase* context)
 {
     return adoptRef(new OESElementIndexUint(context));
 }
 
-bool OESElementIndexUint::supported(WebGLRenderingContext* context)
+bool OESElementIndexUint::supported(WebGLRenderingContextBase* context)
 {
     Extensions3D* extensions = context->graphicsContext3D()->getExtensions();
     return extensions->supports("GL_OES_element_index_uint");