LibAccelGfx+LibWeb: Explicitly pass OpenGL context to Painter

Let's not assume there is one global OpenGL context because it might
change once we will start creating >1 page inside single WebContent
process or contexts for WebGL.

Userland/Libraries/LibAccelGfx/Context.cpp

@@ -16,14 +16,6 @@
 
 namespace AccelGfx {
 
-Context& Context::the()
-{
-    static OwnPtr<Context> s_the;
-    if (!s_the)
-        s_the = Context::create();
-    return *s_the;
-}
-
 #ifdef AK_OS_MACOS
 static void make_context_cgl()
 {

Userland/Libraries/LibAccelGfx/Context.h

@@ -20,8 +20,6 @@ namespace AccelGfx {
 
 class Context {
 public:
-    static Context& the();
-
     static OwnPtr<Context> create();
 
     Context()

Userland/Libraries/LibAccelGfx/Painter.cpp

@@ -170,9 +170,8 @@ void main() {
 
 HashMap<u32, GL::Texture> s_immutable_bitmap_texture_cache;
 
-NonnullOwnPtr<Painter> Painter::create()
+NonnullOwnPtr<Painter> Painter::create(Context& context)
 {
-    auto& context = Context::the();
     return make<Painter>(context);
 }
 

Userland/Libraries/LibAccelGfx/Painter.h

@@ -29,7 +29,7 @@ class Painter {
     AK_MAKE_NONMOVABLE(Painter);
 
 public:
-    static NonnullOwnPtr<Painter> create();
+    static NonnullOwnPtr<Painter> create(Context&);
 
     Painter(Context&);
     ~Painter();