Bug 1013155 - (Part I) Remove #keyboard[data-hidden]
Bug 1013155 - (Part II) InputMethodManager and tests
Bug 1013155 - (Part III) Use InputMethodManager to load IMEngine and unblock rendering
Bug 1013155 - (Part IV) Wait for mozL10n to be ready
Bug 1013155 - (Part V) Longer timeout for bug 1007595
Bug 1013155 - (Part VI) More log in render.js
Bug 1013155 - (Part VII) Wait for layout
Bug 1013155 - (Part VIII) Remove useless cachedIMEDimensions
Bug 1013155 - (Part IX) Avoid flickering when switching between inputs
Bug 1013155 - (Part X) Fix a race on keyboard launches

When keyboard loads faster than inputcontext but the layout is loaded after that
(Happened on Peak with OPTIMIZE)
Bug 1013155 - (Part XI) Fix integration test errors
Merge pull request #19421 from timdream/keyboard-defer-imengine

Bug 1013155 - Use InputMethodManager to load IMEngine and unblock rendering, r=rudyl