Bug 1403432: Show window titles when the inspector is launched in windowed mode. r=mstange

widget/cocoa/nsCocoaWindow.mm

@@ -2378,7 +2378,13 @@ nsCocoaWindow::SetDrawsTitle(bool aDrawTitle)
 {
   NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
 
-  [mWindow setWantsTitleDrawn:aDrawTitle];
+  if (![mWindow drawsContentsIntoWindowFrame]) {
+    // If we don't draw into the window frame, we always want to display window
+    // titles.
+    [mWindow setWantsTitleDrawn:YES];
+  } else {
+    [mWindow setWantsTitleDrawn:aDrawTitle];
+  }
 
   NS_OBJC_END_TRY_ABORT_BLOCK;
 }