Bug 1442931: Part 2 - Move internal WebIDL interfaces to separate directory. r=mystor DONTBUILD

This change moves several chrome-only WebIDL files to a separate chrome-only
directory.

There are several other chrome-only interfaces which are heavily tied to DOM
code. Since those should probably still require DOM peer review for changes, I
left them where they were.

MozReview-Commit-ID: K3NsNtfntV6

--HG--
rename : dom/webidl/ChannelWrapper.webidl => dom/chrome-webidl/ChannelWrapper.webidl
rename : dom/webidl/ChromeUtils.webidl => dom/chrome-webidl/ChromeUtils.webidl
rename : dom/webidl/DominatorTree.webidl => dom/chrome-webidl/DominatorTree.webidl
rename : dom/webidl/HeapSnapshot.webidl => dom/chrome-webidl/HeapSnapshot.webidl
rename : dom/webidl/InspectorUtils.webidl => dom/chrome-webidl/InspectorUtils.webidl
rename : dom/webidl/MatchGlob.webidl => dom/chrome-webidl/MatchGlob.webidl
rename : dom/webidl/MatchPattern.webidl => dom/chrome-webidl/MatchPattern.webidl
rename : dom/webidl/MozStorageAsyncStatementParams.webidl => dom/chrome-webidl/MozStorageAsyncStatementParams.webidl
rename : dom/webidl/MozStorageStatementParams.webidl => dom/chrome-webidl/MozStorageStatementParams.webidl
rename : dom/webidl/MozStorageStatementRow.webidl => dom/chrome-webidl/MozStorageStatementRow.webidl
rename : dom/webidl/PrecompiledScript.webidl => dom/chrome-webidl/PrecompiledScript.webidl
rename : dom/webidl/PromiseDebugging.webidl => dom/chrome-webidl/PromiseDebugging.webidl
rename : dom/webidl/StructuredCloneHolder.webidl => dom/chrome-webidl/StructuredCloneHolder.webidl
rename : dom/webidl/WebExtensionContentScript.webidl => dom/chrome-webidl/WebExtensionContentScript.webidl
rename : dom/webidl/WebExtensionPolicy.webidl => dom/chrome-webidl/WebExtensionPolicy.webidl
rename : dom/webidl/moz.build => dom/chrome-webidl/moz.build
extra : rebase_source : be95383471d1abadb742bbce683adc69b317028e
extra : amend_source : ccb7840f3cdc5f7bd9871631e22d26d89a4dc156