Speculative fix for

ContextualSuggestionsTest#testPeekWithPageScrollPercentage

+ Set screen orientation to portrait

Bug: 847340
Change-Id: I05e6bd2f0e76026f36b87433e10fa936858e4e38
Reviewed-on: https://chromium-review.googlesource.com/1098222Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Becky Zhou <huayinz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566906}

chrome/android/javatests/src/org/chromium/chrome/browser/contextual_suggestions/ContextualSuggestionsTest.java

@@ -11,6 +11,7 @@ import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 
+import android.content.pm.ActivityInfo;
 import android.os.SystemClock;
 import android.support.test.InstrumentationRegistry;
 import android.support.test.filters.LargeTest;
@@ -621,10 +622,15 @@ public class ContextualSuggestionsTest {
     }
 
     @Test
-    @FlakyTest(message = "https://crbug.com/850117")
     @MediumTest
     @Feature({"ContextualSuggestions"})
     public void testPeekWithPageScrollPercentage() throws Exception {
+        // Set the screen orientation to portrait since we scroll the web contents in absolute
+        // pixels in the test.
+        mActivityTestRule.getActivity().setRequestedOrientation(
+                ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
+        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+
         CallbackHelper scrollChangedCallback = new CallbackHelper();
         GestureStateListener gestureStateListener = new GestureStateListener() {
             @Override