linked refactor issue

Author: gaaclarke

shell/platform/darwin/ios/framework/Source/FlutterEngineTest_mrc.mm

@@ -36,7 +36,7 @@ - (void)testSpawnsShareGpuContext {
   // If this assert fails it means we may be using the software or OpenGL
   // renderer when we were expecting Metal.  For software rendering, this is
   // expected to be nullptr.  For OpenGL, implementing this is an outstanding
-  // change see b/tbd.
+  // change see https://github.com/flutter/flutter/issues/73744.
   XCTAssertTrue(engine_context->GetMainContext() != nullptr);
   XCTAssertEqual(engine_context->GetMainContext(), spawn_context->GetMainContext());
   [engine release];

shell/platform/darwin/ios/ios_context_gl.mm

@@ -45,7 +45,7 @@
 
 // |IOSContext|
 sk_sp<GrDirectContext> IOSContextGL::GetMainContext() const {
-  /// TODO(b/tbd): Currently the GPUSurfaceGL creates the main context for
+  /// TODO(73744): Currently the GPUSurfaceGL creates the main context for
   /// OpenGL.  With Metal the IOSContextMetal creates the main context and is
   /// shared across surfaces.  We should refactor the OpenGL Context/Surfaces to
   /// behave like the Metal equivalents.  Until then engines in the same group