Remove most native WebContents references from Java

content/shell/android/java/src/org/chromium/content_shell/Shell.java

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.content_shell;
 
 import android.content.Context;
 import android.graphics.drawable.ClipDrawable;
 import android.text.TextUtils;
 import android.util.AttributeSet;
@@ skipping 268 matching lines @@
         if (mLoading) {
             mStopReloadButton
                     .setImageResource(android.R.drawable.ic_menu_close_clear_cancel);
         } else {
             mStopReloadButton.setImageResource(R.drawable.ic_refresh);
         }
     }
 
     /**
      * Initializes the ContentView based on the native tab contents pointer passed in.
-     * @param nativeWebContents The pointer to the native tab contents object.
+     * @param webContents A {@link WebContents} object.
      */
     @SuppressWarnings("unused")
     @CalledByNative
-    private void initFromNativeTabContents(long nativeWebContents) {
+    private void initFromNativeTabContents(WebContents webContents) {
         Context context = getContext();
         mContentViewCore = new ContentViewCore(context);
         ContentView cv = ContentView.newInstance(context, mContentViewCore);
-        mContentViewCore.initialize(cv, cv, nativeWebContents, mWindow);
+        mContentViewCore.initialize(cv, cv, webContents, mWindow);
         mContentViewCore.setContentViewClient(mContentViewClient);
         mWebContents = mContentViewCore.getWebContents();
         mNavigationController = mWebContents.getNavigationController();
         if (getParent() != null) mContentViewCore.onShow();
         if (mWebContents.getUrl() != null) {
             mUrlTextView.setText(mWebContents.getUrl());
         }
         ((FrameLayout) findViewById(R.id.contentview_holder)).addView(cv,
                 new FrameLayout.LayoutParams(
                         FrameLayout.LayoutParams.MATCH_PARENT,
@@ skipping 40 matching lines @@
                 Context.INPUT_METHOD_SERVICE);
         if (visible) {
             imm.showSoftInput(mUrlTextView, InputMethodManager.SHOW_IMPLICIT);
         } else {
             imm.hideSoftInputFromWindow(mUrlTextView.getWindowToken(), 0);
         }
     }
 
     private static native void nativeCloseShell(long shellPtr);
 }