Full-height tabs in maximised win32 windows

app/background-process/ui/windows.js

@@ -189,6 +189,8 @@ export function createShellWindow (windowState) {
     unregisterShortcut(win, 'Esc')
     sendToWebContents('leave-full-screen')(e)
   })
+  win.on('maximize', sendToWebContents('maximize'))
+  win.on('unmaximize', sendToWebContents('unmaximize'))
   win.on('closed', onClosed(win))
 
   return win

app/shell-window/ui.js

@@ -61,6 +61,8 @@ function onWindowEvent (event, type) {
       break
     case 'enter-full-screen': return document.body.classList.add('fullscreen')
     case 'leave-full-screen': return document.body.classList.remove('fullscreen')
+    case 'maximize': return document.body.classList.add('maximized')
+    case 'unmaximize': return document.body.classList.remove('maximized')    
     case 'leave-page-full-screen': pages.leavePageFullScreen()
   }
 }

app/stylesheets/shell-window/chrome-tabs.less

@@ -257,8 +257,8 @@ body.darwin .chrome-tabs {
   -webkit-app-region: drag;
 }
 
-// make room for resizing on the top
-body.win32 {
+// make room for resizing on the top when not maximized.
+body:not(.maximized).win32{
   .chrome-tabs-shell {
     padding-top: 4px;
   }
@@ -272,6 +272,17 @@ body.win32 {
   }
 }
 
+// Ensure tabs go right to top of screen when maximized on win32.
+body.maximized.win32 {
+  .chrome-tab {
+    top: 0px;
+  }
+
+  .chrome-tabs-shell {
+    height: 30px;
+  }
+}
+
 // make room for the traffic lights
 .darwin:not(.fullscreen) .chrome-tabs {
   padding-left: 75px;

app/stylesheets/shell-window/toolbar.less

@@ -22,6 +22,11 @@ body.fullscreen #toolbar {
   background: #e0e0e0;
 }
 
+// Ensure toolbar resizes correctly when maximized on win32.
+body.maximized.win32 {
+  height: 68px;
+}
+
 .download-started-animation {
   position: fixed;
   bottom: 20px;

app/stylesheets/shell-window/win32-titlebar.less

@@ -61,4 +61,15 @@
 }
 body.win32 #win32-titlebar {
   display: flex;
+}
+
+// Ensure that the controls are properly sized when maximized.
+body.maximized.win32 {
+  #win32-titlebar {
+    height: 30px;
+  }
+
+  #win32-titlebar .win32-titlebar-close:after {
+    line-height: 30px;
+  }
 }