Make the keyboard reappear when you tap on a text field after having dismissed the keyboard.

services/keyboard/org/chromium/mojo/keyboard/KeyboardServiceImpl.java

Index: services/keyboard/org/chromium/mojo/keyboard/KeyboardServiceImpl.java
diff --git a/services/keyboard/org/chromium/mojo/keyboard/KeyboardServiceImpl.java b/services/keyboard/org/chromium/mojo/keyboard/KeyboardServiceImpl.java
index 36d53b717b4d954c0c0f167d579346d3db1cc9f0..461fca3af2d19198624d9d9ab079bdf20463bcc3 100644
--- a/services/keyboard/org/chromium/mojo/keyboard/KeyboardServiceImpl.java
+++ b/services/keyboard/org/chromium/mojo/keyboard/KeyboardServiceImpl.java
@@ -65,6 +65,13 @@ public class KeyboardServiceImpl implements KeyboardService {
         imm.showSoftInput(sActiveView, InputMethodManager.SHOW_IMPLICIT);
     }
 
+    @Override
+    public void showByRequest() {
+        InputMethodManager imm =
+                (InputMethodManager) mContext.getSystemService(Context.INPUT_METHOD_SERVICE);
+        imm.showSoftInput(sActiveView, 0);
+    }
+
     public void hide() {
         InputMethodManager imm =
                 (InputMethodManager) mContext.getSystemService(Context.INPUT_METHOD_SERVICE);