Revert of Implement "Look Up In Dictionary" context menu item asynchronously.

content/browser/renderer_host/render_widget_host_view_mac.mm

Index: content/browser/renderer_host/render_widget_host_view_mac.mm
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.mm b/content/browser/renderer_host/render_widget_host_view_mac.mm
index f4925cef60bd1043fc954e3e87314bfbd9f1e678..9500038092b8c8630da89909a8f4d2ae95452169 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac.mm
@@ -2355,9 +2355,10 @@
   }
 }
 
-- (void)showLookUpDictionaryOverlayAtPoint:(NSPoint)point {
-  // The PDF plugin does not support getting the attributed string at point.
-  // TODO: support GetStringAtPoint() for PDF. See crbug.com/152438.
+// This is invoked only on 10.8 or newer when the user taps a word using
+// three fingers.
+- (void)quickLookWithEvent:(NSEvent*)event {
+  NSPoint point = [self convertPoint:[event locationInWindow] fromView:nil];
   TextInputClientMac::GetInstance()->GetStringAtPoint(
       renderWidgetHostView_->render_widget_host_,
       gfx::Point(point.x, NSHeight([self frame]) - point.y),
@@ -2370,13 +2371,6 @@
           }
       }
   );
-}
-
-// This is invoked only on 10.8 or newer when the user taps a word using
-// three fingers.
-- (void)quickLookWithEvent:(NSEvent*)event {
-  NSPoint point = [self convertPoint:[event locationInWindow] fromView:nil];
-  [self showLookUpDictionaryOverlayAtPoint:point];
 }
 
 // This method handles 2 different types of hardware events.