Fix composition key-code after switching to a new input field.

content/public/android/javatests/src/org/chromium/content/browser/input/ImeTest.java

Index: content/public/android/javatests/src/org/chromium/content/browser/input/ImeTest.java
diff --git a/content/public/android/javatests/src/org/chromium/content/browser/input/ImeTest.java b/content/public/android/javatests/src/org/chromium/content/browser/input/ImeTest.java
index db2abf86ee4fe044c4558596138af2ace2898236..143c68194e7da9bd8a41be96510e6872ee6e7215 100644
--- a/content/public/android/javatests/src/org/chromium/content/browser/input/ImeTest.java
+++ b/content/public/android/javatests/src/org/chromium/content/browser/input/ImeTest.java
@@ -482,6 +482,29 @@ public class ImeTest extends ContentShellTestBase {
         waitAndVerifyEditableCallback(mConnection.mImeUpdateQueue, 3, "hello\n\n", 6, 6, -1, -1);
     }
 
+    @SmallTest
+    @Feature({"TextInput", "Main"})
+    public void testTransitionsWhileComposingText() throws Throwable {
+        DOMUtils.focusNode(mContentViewCore, "textarea");
+        assertWaitForKeyboardStatus(true);
+
+        mConnection = (TestAdapterInputConnection) getAdapterInputConnection();
+        waitAndVerifyEditableCallback(mConnection.mImeUpdateQueue, 0, "", 0, 0, -1, -1);
+
+        // H
+        expectUpdateStateCall(mConnection);
+        setComposingText(mConnection, "h", 1);
+        assertEquals(KeyEvent.KEYCODE_H, mImeAdapter.mLastSyntheticKeyCode);
+
+        // Simulate switch of input fields.
+        finishComposingText(mConnection);
+
+        // H
+        expectUpdateStateCall(mConnection);
+        setComposingText(mConnection, "h", 1);
+        assertEquals(KeyEvent.KEYCODE_H, mImeAdapter.mLastSyntheticKeyCode);
+    }
+
     private void performGo(final AdapterInputConnection inputConnection,
             TestCallbackHelperContainer testCallbackHelperContainer) throws Throwable {
         handleBlockingCallbackAction(