[android_webview] Hardcode the default text encoding to UTF-8.

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index 0da8e2001bef73e2441c659308c19acfd7c55026..daba447a0078f36700366568820c9ff1a6361db1 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -537,10 +537,6 @@ SkBitmap* ChromeContentRendererClient::GetSadWebViewBitmap() {
       GetImageNamed(IDR_SAD_WEBVIEW).ToSkBitmap());
 }
 
-std::string ChromeContentRendererClient::GetDefaultEncoding() {
-  return l10n_util::GetStringUTF8(IDS_DEFAULT_ENCODING);
-}
-
 #if defined(ENABLE_EXTENSIONS)
 const Extension* ChromeContentRendererClient::GetExtensionByOrigin(
     const WebSecurityOrigin& origin) const {