AsyncInitializationActivity#checkOrientation() should check orientation not rotation

Previously checkOrientation() would get the new rotation, see if the rotation
changed, and if it did call onOrientationChanged() with the new rotation.
This is confusing since rotation and orientation mean different things. The only
consumer of these onOrientationChanged() events is ToolbarManager#onOrientionChanged()
which does two things:

1) ActionModeController#showControlsOnOrientationChange()
ActionModeController#showControlsOnOrientationChange() suggests listening to
orientation changes is more correct than rotation changes.

2) Update the Duet adaptive toolbar using Configuration#orientation.
Listening to orientation changes will fix the adaptive toolbar bugs that are linked.


Bug: 938860, 938564, 935348
Change-Id: Icc759d4821b9dd397b0ccc7ea824b143ad474212
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1512934
Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Pedro Amaral <amaralp@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#639642}(cherry picked from commit fa266cacff34c30936e54f7eaf3e2379136c0161)
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1519090
Reviewed-by: Pedro Amaral <amaralp@chromium.org>
Cr-Commit-Position: refs/branch-heads/3729@{#61}
Cr-Branched-From: d4a8972-refs/heads/master@{#638880}

Author: Pedro Amaral

chrome/android/java/src/org/chromium/chrome/browser/init/AsyncInitializationActivity.java

@@ -20,7 +20,6 @@
 import android.support.annotation.Nullable;
 import android.view.Display;
 import android.view.Menu;
-import android.view.Surface;
 import android.view.View;
 import android.view.ViewTreeObserver;
 import android.view.ViewTreeObserver.OnPreDrawListener;
@@ -75,7 +74,7 @@ public abstract class AsyncInitializationActivity
     private ActivityWindowAndroid mWindowAndroid;
     private ModalDialogManager mModalDialogManager;
     private Bundle mSavedInstanceState;
-    private int mCurrentOrientation = Surface.ROTATION_0;
+    private int mCurrentOrientation;
     private boolean mDestroyed;
     private long mLastUserInteractionTime;
     private boolean mIsTablet;
@@ -693,9 +692,8 @@ public long getLastUserInteractionTime() {
     /**
      * Called when the orientation of the device changes.  The orientation is checked/detected on
      * root view layouts.
-     * @param orientation One of {@link Surface#ROTATION_0} (no rotation),
-     *                    {@link Surface#ROTATION_90}, {@link Surface#ROTATION_180}, or
-     *                    {@link Surface#ROTATION_270}.
+     * @param orientation One of {@link Configuration#ORIENTATION_PORTRAIT} or
+     *                    {@link Configuration#ORIENTATION_LANDSCAPE}.
      */
     protected void onOrientationChange(int orientation) {
     }
@@ -708,7 +706,7 @@ private void checkOrientation() {
         if (display == null) return;
 
         int oldOrientation = mCurrentOrientation;
-        mCurrentOrientation = display.getRotation();
+        mCurrentOrientation = getResources().getConfiguration().orientation;
 
         if (oldOrientation != mCurrentOrientation) onOrientationChange(mCurrentOrientation);
     }