[InputEvent] Dispatch 'input' event for ContentEditable and typing on Input element

third_party/WebKit/Source/core/editing/InputMethodControllerTest.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/editing/InputMethodController.h"
 
 #include "core/dom/Element.h"
 #include "core/dom/Range.h"
 #include "core/editing/FrameSelection.h"
 #include "core/events/MouseEvent.h"
@@ skipping 338 matching lines @@
     EXPECT_EQ(24u, controller().getSelectionOffsets().end());
 }
 
 TEST_F(InputMethodControllerTest, CompositionFireBeforeInput)
 {
     document().settings()->setScriptEnabled(true);
     Element* editable = insertHTMLElement("<div id='sample' contentEditable='true'></div>", "sample");
     Element* script = document().createElement("script", ASSERT_NO_EXCEPTION);
     script->setInnerHTML(
         "document.getElementById('sample').addEventListener('beforeinput', function(event) {"
-        "    document.title = `beforeinput.isComposing:${event.isComposing}`;"
+        "    document.title = `beforeinput.isComposing:${event.isComposing};`;"
+        "});"
+        "document.getElementById('sample').addEventListener('input', function(event) {"
+        "    document.title += `input.isComposing:${event.isComposing};`;"
         "});",
         ASSERT_NO_EXCEPTION);
     document().body()->appendChild(script, ASSERT_NO_EXCEPTION);
     document().view()->updateAllLifecyclePhases();
 
     // Simulate composition in the |contentEditable|.
     Vector<CompositionUnderline> underlines;
     underlines.append(CompositionUnderline(0, 5, Color(255, 0, 0), false, 0));
     editable->focus();
 
     document().setTitle(emptyString());
     controller().setComposition("foo", underlines, 0, 3);
-    EXPECT_STREQ("beforeinput.isComposing:true", document().title().utf8().data());
+    EXPECT_STREQ("beforeinput.isComposing:true;input.isComposing:true;", document().title().utf8().data());
 
     document().setTitle(emptyString());
     controller().confirmComposition();
     // Last 'beforeinput' should also be inside composition scope.
-    EXPECT_STREQ("beforeinput.isComposing:true", document().title().utf8().data());
+    EXPECT_STREQ("beforeinput.isComposing:true;input.isComposing:true;", document().title().utf8().data());

[chongz, 2016/06/23 00:32:06]

Testing |isComposing|

 }
 
 } // namespace blink