pip2: Always elide the URL in the titlebar

This CL ensures that the URL in a document picture-in-picture window is
always elided, even when the user has selected "Always Show Full URLs"
in the omnibox.

Bug: 1450376
Change-Id: I6275e0ff9d3a9a860e5e4086732d717c47bdc3fc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4581312
Commit-Queue: Tommy Steimel <steimel@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1152637}

chrome/browser/ui/views/frame/picture_in_picture_browser_frame_view.cc

@@ -587,6 +587,12 @@ bool PictureInPictureBrowserFrameView::GetURL(GURL* url) const {
   return false;
 }
 
+bool PictureInPictureBrowserFrameView::ShouldPreventElision() {
+  // We should never allow the full URL to show, as the PiP window only cares
+  // about the origin of the opener.
+  return false;
+}
+
 bool PictureInPictureBrowserFrameView::ShouldTrimDisplayUrlAfterHostName()
     const {
   // We need to set the window title URL to be eTLD+1.

chrome/browser/ui/views/frame/picture_in_picture_browser_frame_view.h

@@ -87,6 +87,7 @@ class PictureInPictureBrowserFrameView
   // ChromeLocationBarModelDelegate:
   content::WebContents* GetActiveWebContents() const override;
   bool GetURL(GURL* url) const override;
+  bool ShouldPreventElision() override;
   bool ShouldTrimDisplayUrlAfterHostName() const override;
   bool ShouldDisplayURL() const override;