Add article link to play promises rejection error message

third_party/WebKit/Source/core/html/HTMLMediaElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights
  * reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 875 matching lines @@
 
     DCHECK(!paused_ || play_promise_resolvers_.IsEmpty());
 
     // 4.6 - If the paused attribute is false, then run these substeps
     if (!paused_) {
       // 4.6.1 - Set the paused attribute to true.
       paused_ = true;
 
       // 4.6.2 - Take pending play promises and reject pending play promises
       // with the result and an "AbortError" DOMException.
-      RejectPlayPromises(
-          kAbortError,
-          "The play() request was interrupted by a new load request.");
+      RejectPlayPromises(kAbortError,
+                         "The play() request was interrupted by a new load "
+                         "request. https://goo.gl/LdLk22");
     }
 
     // 4.7 - If seeking is true, set it to false.
     seeking_ = false;
 
     // 4.8 - Set the current playback position to 0.
     //       Set the official playback position to 0.
     //       If this changed the official playback position, then queue a task
     //       to fire a simple event named timeupdate at the media element.
     // 4.9 - Set the initial playback position to 0.
@@ skipping 3027 matching lines @@
 
   play_promise_resolve_list_.clear();
 }
 
 void HTMLMediaElement::RejectScheduledPlayPromises() {
   // TODO(mlamouri): the message is generated based on the code because
   // arguments can't be passed to a cancellable task. In order to save space
   // used by the object, the string isn't saved.
   DCHECK(play_promise_error_code_ == kAbortError ||
          play_promise_error_code_ == kNotSupportedError);
-  if (play_promise_error_code_ == kAbortError)
-    RejectPlayPromisesInternal(
-        kAbortError,
-        "The play() request was interrupted by a call to pause().");
-  else
+  if (play_promise_error_code_ == kAbortError) {
+    RejectPlayPromisesInternal(kAbortError,
+                               "The play() request was interrupted by a call "
+                               "to pause(). https://goo.gl/LdLk22");
+  } else {
     RejectPlayPromisesInternal(
         kNotSupportedError,
         "Failed to load because no supported source was found.");
+  }
 }
 
 void HTMLMediaElement::RejectPlayPromises(ExceptionCode code,
                                           const String& message) {
   play_promise_reject_list_.AppendVector(play_promise_resolvers_);
   play_promise_resolvers_.clear();
   RejectPlayPromisesInternal(code, message);
 }
 
 void HTMLMediaElement::RejectPlayPromisesInternal(ExceptionCode code,
@@ skipping 127 matching lines @@
       kMostlyFillViewportBecomeStableSeconds, BLINK_FROM_HERE);
 }
 
 void HTMLMediaElement::ViewportFillDebouncerTimerFired(TimerBase*) {
   mostly_filling_viewport_ = true;
   if (web_media_player_)
     web_media_player_->BecameDominantVisibleContent(mostly_filling_viewport_);
 }
 
 }  // namespace blink