Material PDF: Support RTL languages

chrome/browser/resources/pdf/toolbar_manager.js

Index: chrome/browser/resources/pdf/toolbar_manager.js
diff --git a/chrome/browser/resources/pdf/toolbar_manager.js b/chrome/browser/resources/pdf/toolbar_manager.js
index a9c9c36e2b378b20af28446efad61d40561e47f8..796fc9d6c10cf4aec4da0a555c02966ef7b8eba9 100644
--- a/chrome/browser/resources/pdf/toolbar_manager.js
+++ b/chrome/browser/resources/pdf/toolbar_manager.js
@@ -42,8 +42,11 @@ function isMouseNearTopToolbar(e) {
  * screen.
  */
 function isMouseNearSideToolbar(e) {
-  return e.x > window.innerWidth - SIDE_TOOLBAR_REVEAL_DISTANCE_RIGHT &&
-         e.y > window.innerHeight - SIDE_TOOLBAR_REVEAL_DISTANCE_BOTTOM;
+  var atSide = e.x > window.innerWidth - SIDE_TOOLBAR_REVEAL_DISTANCE_RIGHT;
+  if (document.dir == 'rtl')
+    atSide = e.x < SIDE_TOOLBAR_REVEAL_DISTANCE_RIGHT;
+  var atBottom = e.y > window.innerHeight - SIDE_TOOLBAR_REVEAL_DISTANCE_BOTTOM;
+  return atSide && atBottom;
 }
 
 /**