[Android] Clean up ViewAndroid and WindowAndroid checks

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
index cf404ccede7786d7b841e99bbf716a4cc07ae6d7..45f6f8719ee76dd9984c0f4e0de72f83d035b204 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
@@ -615,13 +615,11 @@ public class ContentViewCore
             }
         };
 
-        long windowNativePointer = windowAndroid != null ? windowAndroid.getNativePointer() : 0;
-
-        long viewAndroidNativePointer = 0;
-        if (windowNativePointer != 0) {
-            mViewAndroid = new ViewAndroid(windowAndroid, getViewAndroidDelegate());
-            viewAndroidNativePointer = mViewAndroid.getNativePointer();
-        }
+        long windowNativePointer = windowAndroid.getNativePointer();
+        assert windowNativePointer != 0;
+        mViewAndroid = new ViewAndroid(windowAndroid, getViewAndroidDelegate());
+        long viewAndroidNativePointer = mViewAndroid.getNativePointer();
+        assert viewAndroidNativePointer != 0;
 
         mZoomControlsDelegate = new ZoomControlsDelegate() {
             @Override