Remove InputComponent.getDomNode method

Access the dom node directly in TextEditorElement instead

Signed-off-by: Damien Guard <damieng@github.com>

src/input-component.coffee

@@ -2,9 +2,6 @@ module.exports =
 class InputComponent
   constructor: (@domNode) ->
 
-  getDomNode: ->
-    @domNode
-
   updateSync: (state) ->
     @oldState ?= {}
     newState = state.hiddenInput

src/text-editor-component.coffee

@@ -346,7 +346,6 @@ class TextEditorComponent
   focused: ->
     if @mounted
       @presenter.setFocused(true)
-      @hiddenInputComponent.getDomNode().focus()
 
   blurred: ->
     if @mounted

src/text-editor-element.coffee

@@ -139,6 +139,7 @@ class TextEditorElement extends HTMLElement
 
   focused: (event) ->
     @component?.focused()
+    @hiddenInputElement.focus()
 
   blurred: (event) ->
     if event.relatedTarget is @hiddenInputElement