Serialize root view font size

spec/app/root-view-spec.coffee

@@ -530,6 +530,12 @@ describe "RootView", ->
       rootView.setFontSize(0)
       expect(rootView.getFontSize()).toBe 1
 
+    it "is serialized and set when deserialized", ->
+      rootView.setFontSize(100)
+      rootView.remove()
+      newRootView = RootView.deserialize(rootView.serialize())
+      expect(newRootView.getFontSize()).toBe(100)
+
   describe ".open(path, options)", ->
     describe "when there is no active editor", ->
       beforeEach ->

src/app/root-view.coffee

@@ -22,9 +22,10 @@ class RootView extends View
         @div id: 'vertical', outlet: 'vertical', =>
           @div id: 'panes', outlet: 'panes'
 
-  @deserialize: ({ projectPath, panesViewState, extensionStates }) ->
+  @deserialize: ({ projectPath, panesViewState, extensionStates, fontSize }) ->
     rootView = new RootView(projectPath, extensionStates: extensionStates, suppressOpen: true)
     rootView.setRootPane(rootView.deserializeView(panesViewState)) if panesViewState
+    rootView.setFontSize(fontSize) if fontSize > 0
     rootView
 
   extensions: null
@@ -47,6 +48,7 @@ class RootView extends View
     projectPath: @project?.getPath()
     panesViewState: @panes.children().view()?.serialize()
     extensionStates: @serializeExtensions()
+    fontSize: @getFontSize()
 
   handleEvents: ->
     @on 'toggle-dev-tools', => atom.toggleDevTools()