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

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 : source : 195cbf3d34334978e5a9d101d4b79f899598159c
extra : amend_source : 9ef85f3436706de0049f6c5619407ef4bba4d539
extra : histedit_source : aa0ba8a35662566ad77ad3bb6adbd8cb062f0498