Revert of Removing X11 native_event uses for key events.

Revert of Removing X11 native_event uses for key events. (patchset #7 id:180001 of https://codereview.chromium.org/479873002/)

Reason for revert:
Broke Android Tests (dbg)

C  427.575s Main  [FAIL] org.chromium.content.browser.input.ImeTest#testKeyCodesWhileComposingText:
C  427.575s Main  junit.framework.AssertionFailedError
C  427.575s Main  	at org.chromium.content.browser.input.ImeTest.assertUpdateStateCall(ImeTest.java:694)
C  427.575s Main  	at org.chromium.content.browser.input.ImeTest.testKeyCodesWhileComposingText(ImeTest.java:410)
C  427.575s Main  	at java.lang.reflect.Method.invokeNative(Native Method)
C  427.575s Main  	at android.test.InstrumentationTestCase.runMethod(InstrumentationTestCase.java:214)
C  427.575s Main  	at android.test.InstrumentationTestCase.runTest(InstrumentationTestCase.java:199)
C  427.575s Main  	at android.test.ActivityInstrumentationTestCase2.runTest(ActivityInstrumentationTestCase2.java:192)
C  427.575s Main  	at org.chromium.content_shell_apk.ContentShellTestBase.runTest(ContentShellTestBase.java:227)
C  427.575s Main  	at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:191)
C  427.575s Main  	at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:176)
C  427.575s Main  	at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:554)
C  427.575s Main  	at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1701)

Original issue's description:
> Removing uses of X11 native key events.
> 
> BUG=380349
> 
> Committed: https://chromium.googlesource.com/chromium/src/+/bbb7ea7c66f18298079eea4a6b24834986f4a822
> 
> Committed: https://chromium.googlesource.com/chromium/src/+/13d90b146a400156427243d05159cadd8d72c0b9

TBR=sadrul@chromium.org,sky@chromium.org,erg@chromium.org,jamesr@chromium.org,boliu@chromium.org,kpschoedel@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=380349
Committed: https://crrev.com/1125c1167a776f1da2a9196a12b40c91ffee04af
Cr-Commit-Position: refs/heads/master@{#293732}

[arv (Not doing code reviews), 2014-09-08 15:38:38]

Created Revert of Removing X11 native_event uses for key events.

[arv (Not doing code reviews), 2014-09-08 15:39:00]

arv@chromium.org changed reviewers:
+ keishi@chromium.org

[arv (Not doing code reviews), 2014-09-08 15:39:00]

FY keishi

[commit-bot: I haz the power, 2014-09-08 15:39:04]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/arv@chromium.org/548303003/1

[commit-bot: I haz the power, 2014-09-08 15:41:58]

Committed patchset #1 (id:1) as 08456d963f10ddd4e2c9a38cf97c94bceb2b1d0c

[commit-bot: I haz the power, 2014-09-10 03:46:31]

Patchset 1 (id:??) landed as
https://crrev.com/1125c1167a776f1da2a9196a12b40c91ffee04af
Cr-Commit-Position: refs/heads/master@{#293732}