Revert of Mark some AwContentsClientFullScreenTest tests flaky. (patchset #2...

Revert of Mark some AwContentsClientFullScreenTest tests flaky. (patchset #2 id:20001 of https://codereview.chromium.org/2011453002/ )

Reason for revert:
Avoid disabling these tests on CQ

Original issue's description:
> Mark some AwContentsClientFullScreenTest tests flaky.
>
> BUG=614318
>
> Committed: https://crrev.com/22a7f8467da532e4ab9f07256de4a11e93888341
> Cr-Commit-Position: refs/heads/master@{#395588}

TBR=torne@chromium.org,mvanouwerkerk@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=614318

Review-Url: https://codereview.chromium.org/2039463004
Cr-Commit-Position: refs/heads/master@{#397859}

android_webview/javatests/src/org/chromium/android_webview/test/AwContentsClientFullScreenTest.java

@@ -12,7 +12,6 @@ import android.view.ViewGroup;
 import org.chromium.android_webview.test.util.JavascriptEventObserver;
 import org.chromium.android_webview.test.util.VideoSurfaceViewUtils;
 import org.chromium.base.test.util.Feature;
-import org.chromium.base.test.util.FlakyTest;
 import org.chromium.base.test.util.parameter.ParameterizedTest;
 import org.chromium.content.browser.ContentViewCore;
 import org.chromium.content.browser.test.util.Criteria;
@@ -166,7 +165,6 @@ public class AwContentsClientFullScreenTest extends AwTestBase {
 
     @MediumTest
     @Feature({"AndroidWebView"})
-    @FlakyTest
     public void testExitFullscreenEndsIfAppInvokesCallbackFromOnHideCustomView() throws Throwable {
         mContentsClient.setOnHideCustomViewRunnable(new Runnable() {
             @Override
@@ -199,7 +197,6 @@ public class AwContentsClientFullScreenTest extends AwTestBase {
 
     @MediumTest
     @Feature({"AndroidWebView"})
-    @FlakyTest
     public void testHolePunchingSurfaceNotCreatedForClearVideo()
             throws Throwable {
         loadTestPage(VIDEO_TEST_URL);
@@ -250,7 +247,6 @@ public class AwContentsClientFullScreenTest extends AwTestBase {
 
     @MediumTest
     @Feature({"AndroidWebView"})
-    @FlakyTest
     public void testOnShowCustomViewRemovesHolePunchingSurfaceForVideo()
             throws Throwable {
         getInstrumentation().runOnMainSync(new Runnable() {