This CL implements custom elements. The design is as follows:
1) Authors subclass Element and call registerElement.
2) When we create C++ elements for custom elements, we call the author's
constructor synchronously.
3) The attach/detach/attributeChanged callbacks are called either:
a) when exiting the current custom element callback scoped (e.g., before
returning from appendChild), or
b) when draining the microtask queue.
The implementation in this CL is a bit fragile because we don't detect name
registration conflicts and we let you create custom elements with the same name
as built-in elements. Also, not every part of the engine is prepared to execute
script synchronously below createElement. We'll need to iron out these issues
over time, but this CL is a start.
R=ojan@chromium.org
Review URL: https://codereview.chromium.org/943013002
This CL removes a number of tests that we don't plan to port to Dart:
1) custom-elements. We're going to use a different mechanism for custom
elements. We'll need to write a new set of tests as we implement it.
2) inspector. These are tests of the JS inspector backend, which we don't
plan to use.
3) js. This is a test of a JavaScript feature.
4) mocha. These are tests of the JavaScript testing framework we were using.
5) mutation-observer. We're keeping the C++ code for mutation observers, but
it's unclear how we want to expose this in the platform.
6) resources. These are JavaScript-based testing frameworks.
R=eseidel@chromium.org, ojan@chromium.org
Review URL: https://codereview.chromium.org/920343002
We were not setting the __proto__ property of the generated constructor
so the generated class didn't inherit from the passed class which meant
that statics were not available.
This patch adds the missing call to setPrototype (which sets __proto__).
R=eseidel@chromium.org
Review URL: https://codereview.chromium.org/814683002
