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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Add InspectorInstrumentation builtin object to instrument the code in JS builtins like Promises"
   href="https://bugs.webkit.org/show_bug.cgi?id=147942">147942</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Add InspectorInstrumentation builtin object to instrument the code in JS builtins like Promises
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>528+ (Nightly build)
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>JavaScriptCore
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>utatane.tea&#64;gmail.com
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      <p>
        <div>
        <pre>To provide information to the inspector, JS builtins should have some sort of instrumentation system.
In this patch, we'll introduce a new private namespace object (like Reflect/Math) &#64;InspectorInstrumentation into the builtin JS.
It gives the instrumentation ability to the builtin JS code in JSC.

Here's my design.
In &#64;fulfillPromise in Operation.Promise.js,

function fulfillPromise(...)
{
    ...
    &#64;InspectorInstrumentation.promiseFulfilled(promise);
    ...
}

And in InspectorInstrumentationObject.js (builtin JS code),

function promiseFulfilled(promise)
{
    if (!this.isEnabled)
        return;
    this.promiseFulfilledImpl(promise);  // call C++ code / other inspector code
}</pre>
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      </p>
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