Use WebNode::getElementsByHTMLTagName instead of getElementsByTagName.

android_webview/renderer/aw_render_view_ext.cc

Index: android_webview/renderer/aw_render_view_ext.cc
diff --git a/android_webview/renderer/aw_render_view_ext.cc b/android_webview/renderer/aw_render_view_ext.cc
index 7dd91e27dcc07ba9a9860ab2e57612da518c80b2..41c212523e52497cab2c0931e20c20b7e0a410ea 100644
--- a/android_webview/renderer/aw_render_view_ext.cc
+++ b/android_webview/renderer/aw_render_view_ext.cc
@@ -58,7 +58,8 @@ blink::WebElement GetImgChild(const blink::WebElement& element) {
   // This implementation is incomplete (for example if is an area tag) but
   // matches the original WebViewClassic implementation.
 
-  blink::WebElementCollection collection = element.getElementsByTagName("img");
+  blink::WebElementCollection collection =
+      element.getElementsByHTMLTagName("img");
   DCHECK(!collection.isNull());
   return collection.firstItem();
 }