import org.chromium.content.browser.NavigationHistory; //导入依赖的package包/类
@SuppressWarnings("unused")
@CalledByNative
protected void onLoadProgressChanged(double progress) {
    super.onLoadProgressChanged(progress);
    if (mWebViewClient != null) {
        if (progress == 0) {
            NavigationHistory history = this.getContentView().getContentViewCore().getNavigationHistory();
            NavigationEntry entry = null;
            int currentIndex = history.getCurrentEntryIndex();
            if (currentIndex > -1) {
                entry = history.getEntryAtIndex(history.getCurrentEntryIndex());
            }
            mWebViewClient.onPageStarted(this, getUrl(), entry != null ? entry.getFavicon() : null);
        } else if (progress == 1.0 ) {
            mWebViewClient.onPageFinished(this, getUrl());
        }
    }

    if (mWebChromeClient != null) {
        mWebChromeClient.onProgressChanged(this, (int) (progress * 100));
    }
}
 

import org.chromium.content.browser.NavigationHistory; //导入依赖的package包/类
@Override
public NavigationHistory getDirectedNavigationHistory(boolean isForward, int itemLimit) {
    if (mContentViewCore != null) {
        return mContentViewCore.getDirectedNavigationHistory(isForward, itemLimit);
    } else {
        return new NavigationHistory();
    }
}
 

import org.chromium.content.browser.NavigationHistory; //导入依赖的package包/类
public String getOriginalUrl() {
    NavigationHistory history = mContentViewCore.getNavigationHistory();
    int currentIndex = history.getCurrentEntryIndex();
    if (currentIndex >= 0 && currentIndex < history.getEntryCount()) {
        return history.getEntryAtIndex(currentIndex).getOriginalUrl();
    }
    return null;
}
 

import org.chromium.content.browser.NavigationHistory; //导入依赖的package包/类
public WebBackForwardListChromium(NavigationHistory nav_history) {
    mCurrentIndex = nav_history.getCurrentEntryIndex();
    mHistoryItemList = new ArrayList<WebHistoryItemChromium>(nav_history.getEntryCount());
    for (int i = 0; i < nav_history.getEntryCount(); ++i) {
        mHistoryItemList.add(
                new WebHistoryItemChromium(nav_history.getEntryAtIndex(i)));
    }
}
 

import org.chromium.content.browser.NavigationHistory; //导入依赖的package包/类
/**
 * @see ContentViewCore#getNavigationHistory()
 */
public NavigationHistory getNavigationHistory() {
    return mContentViewCore.getNavigationHistory();
}