[Mac] Update context menu dictionary lookup wording and placement.

content/browser/renderer_host/render_widget_host_view_mac_dictionary_helper.mm

Index: content/browser/renderer_host/render_widget_host_view_mac_dictionary_helper.mm
diff --git a/content/browser/renderer_host/render_widget_host_view_mac_dictionary_helper.mm b/content/browser/renderer_host/render_widget_host_view_mac_dictionary_helper.mm
index bcae7ec4e4e9bdd4549fd1f20c6c6b0785057a50..ea4a0f8a9898ca41a305fd14d7a0a91746e5a189 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac_dictionary_helper.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac_dictionary_helper.mm
@@ -23,7 +23,7 @@ void RenderWidgetHostViewMacDictionaryHelper::ShowDefinitionForSelection() {
   NSRange selection_range = [view_->cocoa_view() selectedRange];
   NSAttributedString* attr_string =
       [view_->cocoa_view() attributedSubstringForProposedRange:selection_range
-                                           actualRange:nil];
+                                                   actualRange:nil];
   if (!attr_string) {
     if (view_->selected_text().empty())
       return;