Revert of android: Migrate old content readback to use async readback (and delegated renderer)

content/browser/android/content_view_core_impl.cc

Index: content/browser/android/content_view_core_impl.cc
diff --git a/content/browser/android/content_view_core_impl.cc b/content/browser/android/content_view_core_impl.cc
index 725207c64f47659db0216a07a8132d920f39dc27..14a50be1120fb3303292312df419096a44305ded 100644
--- a/content/browser/android/content_view_core_impl.cc
+++ b/content/browser/android/content_view_core_impl.cc
@@ -701,17 +701,14 @@
                                       static_cast<jint>(y_dip));
 }
 
-void ContentViewCoreImpl::GetScaledContentBitmap(
+unsigned int ContentViewCoreImpl::GetScaledContentTexture(
     float scale,
-    gfx::Size* out_size,
-    const base::Callback<void(bool, const SkBitmap&)>& result_callback) {
+    gfx::Size* out_size) {
   RenderWidgetHostViewAndroid* view = GetRenderWidgetHostViewAndroid();
-  if (!view) {
-    result_callback.Run(false, SkBitmap());
-    return;
-  }
-
-  view->GetScaledContentBitmap(scale, out_size, result_callback);
+  if (!view)
+    return 0;
+
+  return view->GetScaledContentTexture(scale, out_size);
 }
 
 void ContentViewCoreImpl::StartContentIntent(const GURL& content_url) {