Verify that UISourceCodes are removed as iframes are getting detached.


Running: initialWorkspace
Removed: 0 uiSourceCodes
Workspace: 2 uiSourceCodes.
    debugger:///VM[XXX]
    http://127.0.0.1:8000/devtools/resources/inspected-page.html

Running: createIframes
Removed: 0 uiSourceCodes
Workspace: 12 uiSourceCodes.
    debugger:///VM[XXX]
[+] debugger:///VM[XXX] magic-script.js
[+] debugger:///VM[XXX] magic-script.js
[+] debugger:///VM[XXX] _test_create-iframe1.js
[+] debugger:///VM[XXX] _test_create-iframe2.js
[+] http://127.0.0.1:8000/devtools/bindings/resources/magic-frame.html
[+] http://127.0.0.1:8000/devtools/bindings/resources/magic-script.js
[+] http://127.0.0.1:8000/devtools/bindings/resources/magic-script.js
[+] http://127.0.0.1:8000/devtools/bindings/resources/magic-style.css
    http://127.0.0.1:8000/devtools/resources/inspected-page.html
[+] _test_create-iframe1.js
[+] _test_create-iframe2.js

Running: detachFrame1
Removed: 1 uiSourceCodes
[-] http://127.0.0.1:8000/devtools/bindings/resources/magic-script.js
Workspace: 14 uiSourceCodes.
[+] debugger:///VM[XXX]
    debugger:///VM[XXX]
    debugger:///VM[XXX] magic-script.js
    debugger:///VM[XXX] magic-script.js
    debugger:///VM[XXX] _test_create-iframe1.js
    debugger:///VM[XXX] _test_create-iframe2.js
[+] debugger:///VM[XXX] _test_detachFrame1.js
    http://127.0.0.1:8000/devtools/bindings/resources/magic-frame.html
    http://127.0.0.1:8000/devtools/bindings/resources/magic-script.js
    http://127.0.0.1:8000/devtools/bindings/resources/magic-style.css
    http://127.0.0.1:8000/devtools/resources/inspected-page.html
    _test_create-iframe1.js
    _test_create-iframe2.js
[+] _test_detachFrame1.js

Running: detachFrame2
Removed: 3 uiSourceCodes
[-] http://127.0.0.1:8000/devtools/bindings/resources/magic-frame.html
[-] http://127.0.0.1:8000/devtools/bindings/resources/magic-script.js
[-] http://127.0.0.1:8000/devtools/bindings/resources/magic-style.css
Workspace: 14 uiSourceCodes.
    debugger:///VM[XXX]
    debugger:///VM[XXX]
[+] debugger:///VM[XXX]
    debugger:///VM[XXX] magic-script.js
    debugger:///VM[XXX] magic-script.js
    debugger:///VM[XXX] _test_create-iframe1.js
    debugger:///VM[XXX] _test_create-iframe2.js
    debugger:///VM[XXX] _test_detachFrame1.js
[+] debugger:///VM[XXX] _test_detachFrame2.js
    http://127.0.0.1:8000/devtools/resources/inspected-page.html
    _test_create-iframe1.js
    _test_create-iframe2.js
    _test_detachFrame1.js
[+] _test_detachFrame2.js