Remove WebContents::InsertCSS since it is unused

content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java

 // Copyright 2013 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.browser.webcontents;
 
 import android.graphics.Bitmap;
 import android.graphics.Rect;
 import android.os.Bundle;
 import android.os.Parcel;
@@ skipping 194 matching lines @@
     @Override
     public void unselect() {
         // Unselect may get triggered when certain selection-related widgets
         // are destroyed. As the timing for such destruction is unpredictable,
         // safely guard against this case.
         if (isDestroyed()) return;
         nativeUnselect(mNativeWebContentsAndroid);
     }
 
     @Override
-    public void insertCSS(String css) {
-        if (isDestroyed()) return;
-        nativeInsertCSS(mNativeWebContentsAndroid, css);
-    }
-
-    @Override
     public void onHide() {
         nativeOnHide(mNativeWebContentsAndroid);
     }
 
     @Override
     public void onShow() {
         nativeOnShow(mNativeWebContentsAndroid);
     }
 
     @Override
@@ skipping 287 matching lines @@
     private native String nativeGetVisibleURL(long nativeWebContentsAndroid);
     private native boolean nativeIsLoading(long nativeWebContentsAndroid);
     private native boolean nativeIsLoadingToDifferentDocument(long nativeWebContentsAndroid);
     private native void nativeStop(long nativeWebContentsAndroid);
     private native void nativeCut(long nativeWebContentsAndroid);
     private native void nativeCopy(long nativeWebContentsAndroid);
     private native void nativePaste(long nativeWebContentsAndroid);
     private native void nativeReplace(long nativeWebContentsAndroid, String word);
     private native void nativeSelectAll(long nativeWebContentsAndroid);
     private native void nativeUnselect(long nativeWebContentsAndroid);
-    private native void nativeInsertCSS(long nativeWebContentsAndroid, String css);
     private native void nativeOnHide(long nativeWebContentsAndroid);
     private native void nativeOnShow(long nativeWebContentsAndroid);
     private native void nativeSuspendAllMediaPlayers(long nativeWebContentsAndroid);
     private native void nativeSetAudioMuted(long nativeWebContentsAndroid, boolean mute);
     private native int nativeGetBackgroundColor(long nativeWebContentsAndroid);
     private native void nativeShowInterstitialPage(long nativeWebContentsAndroid,
             String url, long nativeInterstitialPageDelegateAndroid);
     private native boolean nativeIsShowingInterstitialPage(long nativeWebContentsAndroid);
     private native boolean nativeFocusLocationBarByDefault(long nativeWebContentsAndroid);
     private native boolean nativeIsRenderWidgetHostViewReady(long nativeWebContentsAndroid);
@@ skipping 28 matching lines @@
     private native String nativeGetEncoding(long nativeWebContentsAndroid);
     private native void nativeGetContentBitmap(long nativeWebContentsAndroid,
             ContentBitmapCallback callback, Bitmap.Config config, float scale,
             float x, float y, float width, float height);
     private native void nativeOnContextMenuClosed(long nativeWebContentsAndroid);
     private native void nativeReloadLoFiImages(long nativeWebContentsAndroid);
     private native int nativeDownloadImage(long nativeWebContentsAndroid,
             String url, boolean isFavicon, int maxBitmapSize,
             boolean bypassCache, ImageDownloadCallback callback);
 }