[orca] Chromium: Ignore document events from pages with no URI

[Joanmarie Diggs <joanied src gnome org>]

commit c60bdd1fbb9ca2c54fb05cb2c66d6947fe1a8fd4
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue Jan 8 17:31:37 2019 -0500

    Chromium: Ignore document events from pages with no URI

 src/orca/scripts/toolkits/Chromium/script.py | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
---
diff --git a/src/orca/scripts/toolkits/Chromium/script.py b/src/orca/scripts/toolkits/Chromium/script.py
index b26896107..2d682cb6c 100644
--- a/src/orca/scripts/toolkits/Chromium/script.py
+++ b/src/orca/scripts/toolkits/Chromium/script.py
@@ -203,6 +203,11 @@ class Script(web.Script):
     def onDocumentLoadComplete(self, event):
         """Callback for document:load-complete accessibility events."""
 
+        if not self.utilities.documentFrameURI(event.source):
+            msg = "CHROMIUM: Ignoring event from page with no URI."
+            debug.println(debug.LEVEL_INFO, msg, True)
+            return
+
         if super().onDocumentLoadComplete(event):
             return
 
@@ -213,6 +218,11 @@ class Script(web.Script):
     def onDocumentLoadStopped(self, event):
         """Callback for document:load-stopped accessibility events."""
 
+        if not self.utilities.documentFrameURI(event.source):
+            msg = "CHROMIUM: Ignoring event from page with no URI."
+            debug.println(debug.LEVEL_INFO, msg, True)
+            return
+
         if super().onDocumentLoadStopped(event):
             return
 
@@ -223,6 +233,11 @@ class Script(web.Script):
     def onDocumentReload(self, event):
         """Callback for document:reload accessibility events."""
 
+        if not self.utilities.documentFrameURI(event.source):
+            msg = "CHROMIUM: Ignoring event from page with no URI."
+            debug.println(debug.LEVEL_INFO, msg, True)
+            return
+
         if super().onDocumentReload(event):
             return