Move pushState spec chromium-spec with other history specs

spec/api-web-contents-spec.js

@@ -647,20 +647,4 @@ describe('webContents module', function () {
       gen.next()
     })
   })
-
-  describe('History API', () => {
-    it('should push state after calling history.pushState() from the same url', (done) => {
-      w.loadURL('about:blank')
-      w.webContents.once('did-finish-load', () => {
-        // History should have current page by now.
-        assert.equal(w.webContents.length(), 1)
-
-        w.webContents.executeJavaScript('window.history.pushState({}, "")', (result) => {
-          // Initial page + pushed state
-          assert.equal(w.webContents.length(), 2)
-          done()
-        })
-      })
-    })
-  })
 })

spec/chromium-spec.js

@@ -1100,6 +1100,7 @@ describe('chromium feature', function () {
     })
   })
 
+  describe('window.history', function () {
     describe('window.history.go(offset)', function () {
       it('throws an exception when the argumnet cannot be converted to a string', function () {
         assert.throws(function () {
@@ -1107,4 +1108,24 @@ describe('chromium feature', function () {
         }, /Cannot convert object to primitive value/)
       })
     })
+
+    describe('window.history.pushState', function () {
+      it('should push state after calling history.pushState() from the same url', (done) => {
+        w = new BrowserWindow({
+          show: false
+        })
+        w.loadURL('about:blank')
+        w.webContents.once('did-finish-load', () => {
+          // History should have current page by now.
+          assert.equal(w.webContents.length(), 1)
+
+          w.webContents.executeJavaScript('window.history.pushState({}, "")', () => {
+            // Initial page + pushed state
+            assert.equal(w.webContents.length(), 2)
+            done()
+          })
+        })
+      })
+    })
+  })
 })