[DevTools] Typed events and event listeners.

[DevTools] Typed events and event listeners.

BUG=none

[dgozman, 2016-11-24 22:45:27]

dgozman@chromium.org changed reviewers:
+ alph@chromium.org, caseq@chromium.org, lushnikov@chromium.org,
pfeldman@chromium.org

[dgozman, 2016-11-24 22:45:27]

Hi,

What do you think about this? It's fully compiled, and is not very verbose.

- Dmitry

[lushnikov, 2016-11-28 19:01:43]

We can have events namespace which comes handy:

Resources.DOMStorageModel.Events = {
  DOMStorageAdded: class {
    /**
     * @param {!Resources.DOMStorage} storage
     */
    constructor(storage) {
      this.storage = storage;
    }
  },
  DOMStorageRemoved: class {
    /**
     * @param {!Resources.DOMStorage} storage
     */
    constructor(storage) {
      this.storage = storage;
    }
  }
};

https://codereview.chromium.org/2533483002/diff/1/third_party/WebKit/Source/d...
File third_party/WebKit/Source/devtools/front_end/common/ObjectBase.js (right):

https://codereview.chromium.org/2533483002/diff/1/third_party/WebKit/Source/d...
third_party/WebKit/Source/devtools/front_end/common/ObjectBase.js:31:
this._listeners = new Map();
multimap!

[pfeldman, 2016-11-28 19:30:39]

https://codereview.chromium.org/2533483002/diff/1/third_party/WebKit/Source/d...
File third_party/WebKit/Source/devtools/front_end/common/ObjectBase.js (right):

https://codereview.chromium.org/2533483002/diff/1/third_party/WebKit/Source/d...
third_party/WebKit/Source/devtools/front_end/common/ObjectBase.js:38: * @param
{function(!T)} listener
I think this exact thing did not work for me in Runtime.js's instance back in
the day.

https://codereview.chromium.org/2533483002/diff/1/third_party/WebKit/Source/d...
File third_party/WebKit/Source/devtools/front_end/persistence/Persistence.js
(right):

https://codereview.chromium.org/2533483002/diff/1/third_party/WebKit/Source/d...
third_party/WebKit/Source/devtools/front_end/persistence/Persistence.js:230:
Persistence.Persistence.BindingChangedEvent = class {
"FooEvent" should inherit from "Event" and have properties such as "source",
"target", etc.