Tab Capture: Set size before changing target RWHV

content/browser/media/capture/web_contents_tracker.cc

Index: content/browser/media/capture/web_contents_tracker.cc
diff --git a/content/browser/media/capture/web_contents_tracker.cc b/content/browser/media/capture/web_contents_tracker.cc
index 770cb1ede548f75d23e4ba55812cb6e440c3c7e2..32ba724170a10eb6b22031302e6adfbeab63c8fb 100644
--- a/content/browser/media/capture/web_contents_tracker.cc
+++ b/content/browser/media/capture/web_contents_tracker.cc
@@ -107,10 +107,13 @@ void WebContentsTracker::OnPossibleTargetChange(bool force_callback_run) {
 void WebContentsTracker::MaybeDoCallback(bool was_still_tracking) {
   DCHECK(task_runner_->BelongsToCurrentThread());
 
-  if (!callback_.is_null())
-    callback_.Run(was_still_tracking);
+  // Notify of a size change just before notifying of a new target. This allows
+  // the downstream implementation to capture the first frame from the new
+  // target at the correct resolution. http://crbug.com/704277
   if (was_still_tracking)
     MaybeDoResizeCallback();
+  if (!callback_.is_null())
+    callback_.Run(was_still_tracking);
 }
 
 void WebContentsTracker::MaybeDoResizeCallback() {