Moved the majority of WebGL functionality into WebGLRenderingContextBase

Source/core/html/canvas/OESTextureFloat.cpp

Index: Source/core/html/canvas/OESTextureFloat.cpp
diff --git a/Source/core/html/canvas/OESTextureFloat.cpp b/Source/core/html/canvas/OESTextureFloat.cpp
index 3d19049cabe2e72b5c1c0dbae206748cb37a2515..a99d7e611555ebe783ba9b6a08ae9760baa683ce 100644
--- a/Source/core/html/canvas/OESTextureFloat.cpp
+++ b/Source/core/html/canvas/OESTextureFloat.cpp
@@ -30,7 +30,7 @@
 
 namespace WebCore {
 
-OESTextureFloat::OESTextureFloat(WebGLRenderingContext* context)
+OESTextureFloat::OESTextureFloat(WebGLRenderingContextBase* context)
     : WebGLExtension(context)
 {
     ScriptWrappable::init(this);
@@ -46,12 +46,12 @@ WebGLExtension::ExtensionName OESTextureFloat::getName() const
     return OESTextureFloatName;
 }
 
-PassRefPtr<OESTextureFloat> OESTextureFloat::create(WebGLRenderingContext* context)
+PassRefPtr<OESTextureFloat> OESTextureFloat::create(WebGLRenderingContextBase* context)
 {
     return adoptRef(new OESTextureFloat(context));
 }
 
-bool OESTextureFloat::supported(WebGLRenderingContext* context)
+bool OESTextureFloat::supported(WebGLRenderingContextBase* context)
 {
     Extensions3D* extensions = context->graphicsContext3D()->getExtensions();
     return extensions->supports("GL_OES_texture_float");