Fix an issue with symbol lookup identifying path names in Diffusion

Summary:
Depends on D18939. Ref T13047. Symbol lookup can be activated from a diff (in Differential or Diffusion) or from the static view of a file at a particular commit.

In the latter case, we need to figure out the path a little differently. The character and line number approaches still work as written.

Test Plan:
  - Command-clicked symbols in the Diffusion browse view with blame on and off; saw path, line and char populate properly.
  - Command-clicked symbols in Differential diff view to check I didn't break anything.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13047

Differential Revision: https://secure.phabricator.com/D18940

src/applications/diffusion/controller/DiffusionBrowseController.php

@@ -658,6 +658,11 @@ final class DiffusionBrowseController extends DiffusionController {
       ->setBackground(PHUIObjectBoxView::BLUE_PROPERTY)
       ->appendChild($corpus)
       ->addClass('diffusion-mobile-view')
+      ->addSigil('diffusion-file-content-view')
+      ->setMetadata(
+        array(
+          'path' => $this->getDiffusionRequest()->getPath(),
+        ))
       ->setCollapsed(true);
 
     $messages = array();