Remove an unnecessary declaration that seems to be causing link errors only on Windows with some compilers.  Followup to bug 739380, r=bustage

Bug 741066. (Av1) browserPlacesViews.js: Fix 2 "function ... does not always return a value". r=mak77.

Bug 741065. (Av1) controller.js: Fix "function PCDH_onDrop does not always return a value". r=mak77.

Bug 739687. (Av1) test_classifier.html and test_classifier_worker.html: Set preference they depend on, Some rewrite and documentation. r=dcamp.

r=Mossop

Bug 532062 - localStorage/sessionStorage should return undefined (not null) for undefined keys through property access; r=mayhemer

Bug 739537 - No longer drop leading space from the plain text clipboard flavor when exporting both HTML and plain text to clipboard. r=smaug.

--HG--
extra : rebase_source : 0139099de839f77405ec1e606fc0540fc892cbd5

--HG--
extra : rebase_source : c16cdfc4c06b363f54f1d0f37bb006cf977b079a

--HG--
extra : rebase_source : 02d563277907231953728a0a99847c466665dbb0

--HG--
extra : rebase_source : 5ea85a021233cf79a539980efc859a2d5372fe53

When rendering just the current Selection (Print - Selection) then don't create display items
for table-related frames unless the frame itself is part of the selection, and always ask
descendant frames to build display lists [in case they are selected].