Rename InputMethodKeyboard* to VirtualKeyboard* to be more specific

All functionality related to InputMethodKeyboard* were designed to handle the onscreen / virtual keyboard. The class is not directly related to InputMethods. Hence, should be renamed to VirtualKeyboard*.

Bug: 1158633
Change-Id: I06569bcae62755826bfc7dcf479a29dd90db7175
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2592207
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Darren Shen <shend@chromium.org>
Commit-Queue: Keith Lee <keithlee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#837272}
diff --git a/uievents/legacy-domevents-tests/submissions/Microsoft/TextEvent.inputMode.keyboard.html b/uievents/legacy-domevents-tests/submissions/Microsoft/TextEvent.inputMode.keyboard.html
index 9d679d7..472dd96 100644
--- a/uievents/legacy-domevents-tests/submissions/Microsoft/TextEvent.inputMode.keyboard.html
+++ b/uievents/legacy-domevents-tests/submissions/Microsoft/TextEvent.inputMode.keyboard.html
@@ -64,4 +64,4 @@
         <div>Test result: </div>
         <div id='testresult'>FAIL</div>
     </body>
-</html>
\ No newline at end of file
+</html>