Moved the majority of WebGL functionality into WebGLRenderingContextBase

Source/core/html/canvas/OESTextureFloatLinear.cpp

Index: Source/core/html/canvas/OESTextureFloatLinear.cpp
diff --git a/Source/core/html/canvas/OESTextureFloatLinear.cpp b/Source/core/html/canvas/OESTextureFloatLinear.cpp
index 1bf416d8feba083dd65c1402210abaf1e727b295..4f440792194add1f4b6f858837dd671336ae147b 100644
--- a/Source/core/html/canvas/OESTextureFloatLinear.cpp
+++ b/Source/core/html/canvas/OESTextureFloatLinear.cpp
@@ -31,7 +31,7 @@
 
 namespace WebCore {
 
-OESTextureFloatLinear::OESTextureFloatLinear(WebGLRenderingContext* context)
+OESTextureFloatLinear::OESTextureFloatLinear(WebGLRenderingContextBase* context)
     : WebGLExtension(context)
 {
     ScriptWrappable::init(this);
@@ -47,12 +47,12 @@ WebGLExtension::ExtensionName OESTextureFloatLinear::getName() const
     return OESTextureFloatLinearName;
 }
 
-PassRefPtr<OESTextureFloatLinear> OESTextureFloatLinear::create(WebGLRenderingContext* context)
+PassRefPtr<OESTextureFloatLinear> OESTextureFloatLinear::create(WebGLRenderingContextBase* context)
 {
     return adoptRef(new OESTextureFloatLinear(context));
 }
 
-bool OESTextureFloatLinear::supported(WebGLRenderingContext* context)
+bool OESTextureFloatLinear::supported(WebGLRenderingContextBase* context)
 {
     Extensions3D* extensions = context->graphicsContext3D()->getExtensions();
     return extensions->supports("GL_OES_texture_float_linear");