[WebView] Fix issue with transparent background.

android_webview/native/aw_contents.cc

 // 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.
 
 #include "android_webview/native/aw_contents.h"
 
 #include <limits>
 
 #include "android_webview/browser/aw_browser_context.h"
 #include "android_webview/browser/aw_browser_main_parts.h"
@@ skipping 958 matching lines @@
 void AwContents::FocusFirstNode(JNIEnv* env, jobject obj) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   web_contents_->FocusThroughTabTraversal(false);
 }
 
 void AwContents::SetBackgroundColor(JNIEnv* env, jobject obj, jint color) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   render_view_host_ext_->SetBackgroundColor(color);
 }
 
-void AwContents::SetHasTransparentBackground(
-    JNIEnv* env, jobject obj, bool transparent) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  browser_view_renderer_.SetHasTransparentBackground(transparent);
-}
-
 jlong AwContents::ReleasePopupAwContents(JNIEnv* env, jobject obj) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   return reinterpret_cast<intptr_t>(pending_contents_.release());
 }
 
 gfx::Point AwContents::GetLocationOnScreen() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
   if (obj.is_null())
@@ skipping 145 matching lines @@
                             jboolean visible) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   browser_view_renderer_.TrimMemory(level, visible);
 }
 
 void SetShouldDownloadFavicons(JNIEnv* env, jclass jclazz) {
   g_should_download_favicons = true;
 }
 
 }  // namespace android_webview