Remove WebContents::InsertCSS since it is unused

content/browser/web_contents/web_contents_android.cc

 // 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.
 
 #include "content/browser/web_contents/web_contents_android.h"
 
 #include <stdint.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
@@ skipping 308 matching lines @@
 void WebContentsAndroid::SelectAll(JNIEnv* env,
                                    const JavaParamRef<jobject>& obj) {
   web_contents_->SelectAll();
 }
 
 void WebContentsAndroid::Unselect(JNIEnv* env,
                                   const JavaParamRef<jobject>& obj) {
   web_contents_->Unselect();
 }
 
-void WebContentsAndroid::InsertCSS(JNIEnv* env,
-                                   const JavaParamRef<jobject>& jobj,
-                                   const JavaParamRef<jstring>& jcss) {
-  web_contents_->InsertCSS(base::android::ConvertJavaStringToUTF8(env, jcss));
-}
-
 RenderWidgetHostViewAndroid*
     WebContentsAndroid::GetRenderWidgetHostViewAndroid() {
   RenderWidgetHostView* rwhv = NULL;
   rwhv = web_contents_->GetRenderWidgetHostView();
   if (web_contents_->ShowingInterstitialPage()) {
     rwhv = web_contents_->GetInterstitialPage()
                ->GetMainFrame()
                ->GetRenderViewHost()
                ->GetWidget()
                ->GetView();
@@ skipping 387 matching lines @@
   }
   for (const gfx::Size& size : sizes) {
     Java_WebContentsImpl_createSizeAndAddToList(
         env, jsizes.obj(), size.width(), size.height());
   }
   Java_WebContentsImpl_onDownloadImageFinished(
       env, obj->obj(), callback->obj(), id,
       http_status_code, jurl.obj(), jbitmaps.obj(), jsizes.obj());
 }
 }  // namespace content