Fix input type for forward delete input event

A |TypingCommand| is created to execute corresponding input command and
and is reused until it is open for typing.
|TypingCommand::ForwardDeleteKeyPressed()| was reusing last typing
command without resetting its input type, which is fixed in this CL.

Bug: 40736701
Change-Id: I5ca6ed8c3028c90cd32a4d206772bcf9a5d48b2b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5653570
Reviewed-by: Siye Liu <siliu@microsoft.com>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Reviewed-by: Sanket Joshi <sajos@microsoft.com>
Commit-Queue: Sambamurthy Bandaru <sambamurthy.bandaru@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#1321543}

input-events/input-events-typing.html

@@ -126,6 +126,45 @@
     assert_equals(beforeInputEvent.data, inputEvent.data);
 }, 'It triggers beforeinput and input events on typing BACK_SPACE with pre-existing content');
 
+promise_test(async function () {
+    this.add_cleanup(resetRich);
+    rich.innerHTML = '<p>Preexisting <i id="caret">C</i>ontent</p>';
+
+    const expectedResult = [
+        // Pressing 'a', 'b'
+        'insertText',
+        'insertText',
+        // Delete twice
+        'deleteContentForward',
+        'deleteContentForward',
+        // Pressing 'c', 'd'
+        'insertText',
+        'insertText',
+        // Backspace
+        'deleteContentBackward'
+    ];
+    const result = [];
+
+    rich.addEventListener("input", (inputEvent) => {
+      result.push(inputEvent.inputType);
+    });
+
+    await test_driver.click(document.querySelector('#caret')); // Preexisting |Content
+    await test_driver.send_keys(rich, "a"); // Preexisting a|Content
+    await test_driver.send_keys(rich, "b"); // Preexisting ab|Content
+    // Delete
+    await test_driver.send_keys(rich, "\uE017"); // Preexisting ab|ontent
+    // Delete
+    await test_driver.send_keys(rich, "\uE017"); // Preexisting ab|ntent
+    await test_driver.send_keys(rich, "c"); // Preexisting abc|ntent
+    await test_driver.send_keys(rich, "d"); // Preexisting abcd|ntent
+    // Backspace
+    await test_driver.send_keys(rich, "\uE003"); // Preexisting abc|ntent
+
+    assert_equals(result.length, expectedResult.length);
+    expectedResult.forEach((er, index) => assert_equals(result[index], er));
+}, 'Input events have correct inputType updated when different inputs are typed');
+
 promise_test(async function () {
     this.add_cleanup(resetRich);
     rich.innerHTML = '<p>Preexisting <i id="caret">c</i>ontent</p>';
@@ -169,8 +208,8 @@
     // Delete
     await test_driver.send_keys(rich, "\uE017"); // |
 
-    assert_equals(expectedResult.length, result.length);
-    expectedResult.forEach((er, index) => assert_equals(er, result[index]));
+    assert_equals(result.length, expectedResult.length);
+    expectedResult.forEach((er, index) => assert_equals(result[index], er));
 }, 'Input events have correct inputType when selected text is removed with Backspace or Delete');
 
 promise_test(async function() {
@@ -326,7 +365,7 @@
         .keyUp('\uE008')
         .send();
 
-    assert_equals(expectedResult.length, result.length);
-    expectedResult.forEach((er, index) => assert_equals(er, result[index]));
+    assert_equals(result.length, expectedResult.length);
+    expectedResult.forEach((er, index) => assert_equals(result[index], er));
 }, 'InputEvents have correct data/order when typing on textarea and contenteditable');
 </script>