Move assert isNativeInitialized() into TabModelJniBridge

The assert is for debugging as if native is not initialized this will
crash anyway. Moving it from IncognitoTabModelImpl breaks its dependency
on TabModelJniBridge.

Bug: 1109013
Change-Id: I3cd06e4f2115b315bb1ba3e7699e925a9b30c4aa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2511092Reviewed-by: David Trainor <dtrainor@chromium.org>
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823672}

chrome/android/java/src/org/chromium/chrome/browser/tabmodel/IncognitoTabModelImpl.java

@@ -101,11 +101,6 @@ public class IncognitoTabModelImpl implements IncognitoTabModel {
 
     @Override
     public Profile getProfile() {
-        if (mDelegateModel instanceof TabModelJniBridge) {
-            TabModelJniBridge tabModel = (TabModelJniBridge) mDelegateModel;
-            assert tabModel.isNativeInitialized() && tabModel.getProfile() != null;
-            return tabModel.getProfile();
-        }
         return mDelegateModel.getProfile();
     }
 

chrome/android/java/src/org/chromium/chrome/browser/tabmodel/TabModelJniBridge.java

@@ -65,6 +65,7 @@ public abstract class TabModelJniBridge implements TabModel {
 
     @Override
     public Profile getProfile() {
+        assert isNativeInitialized();
         return TabModelJniBridgeJni.get().getProfileAndroid(
                 mNativeTabModelJniBridge, TabModelJniBridge.this);
     }