Web Inspector: provide a way to view XML/HTML/SVG resource responses as a DOM tree

Web Inspector: provide a way to view XML/HTML/SVG resource responses as a DOM tree
https://bugs.webkit.org/show_bug.cgi?id=201046
<rdar://problem/54446087>

Reviewed by Joseph Pecoraro.

* UserInterface/Views/ResourceClusterContentView.js:
(WI.ResourceClusterContentView):
(WI.ResourceClusterContentView.prototype.showRequest):
(WI.ResourceClusterContentView.prototype.showResponse):
(WI.ResourceClusterContentView.prototype.get customRequestDOMContentView): Added.
(WI.ResourceClusterContentView.prototype.get customRequestJSONContentView): Added.
(WI.ResourceClusterContentView.prototype.get customResponseDOMContentView): Added.
(WI.ResourceClusterContentView.prototype.get customResponseJSONContentView): Added.
(WI.ResourceClusterContentView.prototype.get customResponseTextContentView): Added.
(WI.ResourceClusterContentView.prototype._createPathComponent): Added.
(WI.ResourceClusterContentView.prototype._canShowCustomRequestContentView):
(WI.ResourceClusterContentView.prototype._canShowCustomResponseContentView):
(WI.ResourceClusterContentView.prototype._contentViewForResourceType):
(WI.ResourceClusterContentView.prototype._pathComponentForContentView):
(WI.ResourceClusterContentView.prototype._identifierForContentView):
(WI.ResourceClusterContentView.prototype._showContentViewForIdentifier):
(WI.ResourceClusterContentView.prototype._resourceLoadingDidFinish):
(WI.ResourceClusterContentView.prototype._canUseDOMContentViewForContent): Added.
(WI.ResourceClusterContentView.prototype._normalizeMIMETypeForDOM): Added.
(WI.ResourceClusterContentView.prototype._tryEnableCustomRequestContentViews): Added.
(WI.ResourceClusterContentView.prototype._tryEnableCustomResponseContentViews): Added.
(WI.ResourceClusterContentView.createPathComponent): Deleted.
(WI.ResourceClusterContentView.prototype._tryEnableCustomRequestContentView): Deleted.
(WI.ResourceClusterContentView.prototype._tryEnableCustomResponseContentView): Deleted.
* UserInterface/Base/Main.js:
(WI.showResourceRequest):
* UserInterface/Views/PathComponentIcons.css:
(.object-icon .icon): Added.
* UserInterface/Main.html:
* UserInterface/Views/SVGImageResourceClusterContentView.js: Removed.
Reworked to allow more than one custom request/response content view at the same time. As
such, merge the `WI.SVGImageResourceClusterContentView` into this class.

* UserInterface/Views/LocalRemoteObjectContentView.js: Added.
(WI.LocalRemoteObjectContentView):
(WI.LocalRemoteObjectContentView.prototype.get expression):
(WI.LocalRemoteObjectContentView.prototype.renderRemoteObject):
(WI.LocalRemoteObjectContentView.prototype.initialLayout):
(WI.LocalRemoteObjectContentView.prototype.attached):
(WI.LocalRemoteObjectContentView.prototype.closed):
* UserInterface/Views/LocalRemoteObjectContentView.css: Added.
(.content-view.local-remote-object):
* UserInterface/Views/LocalDOMContentView.js: Added.
(WI.LocalDOMContentView):
(WI.LocalDOMContentView.prototype.get expression):
(WI.LocalDOMContentView.prototype.renderRemoteObject):
* UserInterface/Views/LocalJSONContentView.js: Added.
(WI.LocalJSONContentView):
(WI.LocalJSONContentView.prototype.get expression):
(WI.LocalJSONContentView.prototype.renderRemoteObject):
* UserInterface/Views/JSONContentView.js: Removed.
* UserInterface/Views/JSONContentView.css: Removed.
Rework `WI.JSONContentView` into a more generic set of classes that render an object we send
to the inspected page for instrumentation.

* UserInterface/Views/DOMTreeOutline.js:
(WI.DOMTreeOutline.prototype.populateContextMenu):
(WI.DOMTreeOutline.prototype._onmousemove):
(WI.DOMTreeOutline.prototype._onmouseout):
(WI.DOMTreeOutline.prototype._ondragstart):
(WI.DOMTreeOutline.prototype._ondragover):
(WI.DOMTreeOutline.prototype._ondragleave):
(WI.DOMTreeOutline.prototype._ondragend):
(WI.DOMTreeOutline.prototype._hideElements):
* UserInterface/Views/DOMTreeElement.js:
(WI.DOMTreeElement.prototype.populateDOMNodeContextMenu):
* UserInterface/Views/ContextMenuUtilities.js:
(WI.appendContextMenuItemsForDOMNode):
Ensure that interactions that would modify the DOM tree only happen when editable. If the
`WI.DOMTreeOutline` represents a "local" `WI.DOMNode` (one that's been sent to the inspected
page for instrumentation, and shouldn't be part of the main #document), don't allow any
editing actions to be performed.

* UserInterface/Views/TextContentView.js:
(WI.TextContentView):
Allow a `representedObject` object to be provided and used instead of the given `string`.

* Localizations/en.lproj/localizedStrings.js:
* UserInterface/Images/Object.svg: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@249451 268f45cc-cd09-0410-ab3c-d52691b4dbfc