[WebLayer] Let the embedder know if navigation entry will be replaced.

Bug: 1119726
Change-Id: If3a82e7718590e51bafeee191e2176cd2a3f2a4b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2366754
Commit-Queue: Mugdha Lakhani <nator@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Bo <boliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800527}

weblayer/browser/android/javatests/src/org/chromium/weblayer/test/NavigationTest.java

@@ -316,6 +316,9 @@ public class NavigationTest {
             assertEquals(1, navigationController.getNavigationListSize());
         });
 
+        // Verify getter works as expected.
+        assertTrue(params.getShouldReplaceCurrentEntry());
+
         // Verify that a default NavigateParams does not replace.
         final NavigateParams params2 = new NavigateParams();
         navigateAndWaitForCompletion(URL3,

weblayer/public/java/org/chromium/weblayer/NavigateParams.java

@@ -50,4 +50,13 @@ public class NavigateParams {
     org.chromium.weblayer_private.interfaces.NavigateParams toInterfaceParams() {
         return mInterfaceParams;
     }
+
+    /**
+     * Returns true if the current navigation will be replaced, false otherwise.
+     *
+     * @since 83
+     */
+    public boolean getShouldReplaceCurrentEntry() {
+        return mInterfaceParams.mShouldReplaceCurrentEntry;
+    }
 }