Show IME when DPAD_CENTER is pressed

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
index 3ee52e862976573aaa5484ef6d37bc001c0dde56..9dea1cf20d90e39fef4c10dde07a10e3e14892b0 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
@@ -574,6 +574,11 @@ public class ContentViewCore
     }
 
     @VisibleForTesting
+    public void setImeAdapterForTest(ImeAdapter imeAdapter) {
+        mImeAdapter = imeAdapter;
+    }
+
+    @VisibleForTesting
     public ImeAdapter getImeAdapterForTest() {
         return mImeAdapter;
     }
@@ -1825,6 +1830,17 @@ public class ContentViewCore
             return mContainerViewInternals.super_dispatchKeyEvent(event);
         }
 
+        if (event.getKeyCode() == KeyEvent.KEYCODE_DPAD_CENTER) {
+            showImeIfNeeded();
+            // Event is not consumed here, because ImeAdapter might interpret
+            // it as "Enter".
+            // showImeIfNeeded respects the policy of
+            // InputMethodService.onEvaluateInputViewShown. So IME will not be
+            // shown if you have QWERTY physical keyboard attached.
+            // Also, IME will not be shown if the focus is not on the input
+            // field. See ImeAdapter.attachAndShowIfNeeded
+        }
+
         if (mImeAdapter.dispatchKeyEvent(event)) return true;
 
         return mContainerViewInternals.super_dispatchKeyEvent(event);