Load the default favicon as a native image, rather than as a Skia image.

android_webview/browser/aw_content_browser_client.cc

Index: android_webview/browser/aw_content_browser_client.cc
diff --git a/android_webview/browser/aw_content_browser_client.cc b/android_webview/browser/aw_content_browser_client.cc
index f1771b4bb48db0b844f13d8655661816e28eed2e..7c3dc6590991f180d19518ec90060fffd9ba3880 100644
--- a/android_webview/browser/aw_content_browser_client.cc
+++ b/android_webview/browser/aw_content_browser_client.cc
@@ -252,7 +252,7 @@ std::string AwContentBrowserClient::GetAcceptLangs(
   return GetAcceptLangsImpl();
 }
 
-gfx::ImageSkia* AwContentBrowserClient::GetDefaultFavicon() {
+const gfx::ImageSkia* AwContentBrowserClient::GetDefaultFavicon() {
   ResourceBundle& rb = ResourceBundle::GetSharedInstance();
   // TODO(boliu): Bundle our own default favicon?
   return rb.GetImageSkiaNamed(IDR_DEFAULT_FAVICON);