Clear page display after navigation if no rendered output arrives

content/common/content_constants_internal.h

Index: content/common/content_constants_internal.h
diff --git a/content/common/content_constants_internal.h b/content/common/content_constants_internal.h
index a5ce925324a0d73ef1dd21ef9de0b4261b8d7d03..9422b32cb58a5fff2836a89f730093c43b10eac2 100644
--- a/content/common/content_constants_internal.h
+++ b/content/common/content_constants_internal.h
@@ -13,6 +13,10 @@ namespace content {
 // How long to wait before we consider a renderer hung.
 CONTENT_EXPORT extern const int64 kHungRendererDelayMs;
 
+// How long to wait for newly loaded content to send a compositor frame
+// before clearing previously displayed graphics.
+extern const int64 kNewContentRenderingDelayMs;
+
 // The maximum plugin width and height.
 extern const uint16 kMaxPluginSideLength;
 // The maximum plugin size, defined as the number of pixels occupied by the