Address clang complaint about needed parenthesis on logicals....

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.mm

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.h"
 
 #include "base/mac/mac_util.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/browser/bookmarks/bookmark_utils.h"
@@ skipping 824 matching lines @@
       [buttonThatMouseIsIn_ toggleButtonBorderingWhileMouseInside];
     NSRect windowFrame = [[self window] frame];
     NSSize newSize = NSMakeSize(NSWidth(windowFrame), 0.0);
     [self adjustWindowLeft:windowFrame.origin.x
                       size:newSize
                scrollingBy:finalDelta];
   }
 }
 
 - (CGFloat)determineFinalScrollDelta:(CGFloat)delta {
-  if (delta > 0.0 && ![scrollUpArrowView_ isHidden] ||
-      delta < 0.0 && ![scrollDownArrowView_ isHidden]) {
+  if ((delta > 0.0 && ![scrollUpArrowView_ isHidden]) ||
+      (delta < 0.0 && ![scrollDownArrowView_ isHidden])) {
     NSWindow* window = [self window];
     NSRect windowFrame = [window frame];
     NSScreen* screen = [window screen];
     NSPoint scrollPosition = [scrollView_ documentVisibleRect].origin;
     CGFloat scrollY = scrollPosition.y;
     NSRect scrollerFrame = [scrollView_ frame];
     CGFloat scrollerY = NSMinY(scrollerFrame);
     NSRect visibleFrame = [visibleView_ frame];
     CGFloat visibleY = NSMinY(visibleFrame);
     CGFloat windowY = NSMinY(windowFrame);
@@ skipping 815 matching lines @@
 
 - (void)setIgnoreAnimations:(BOOL)ignore {
   ignoreAnimations_ = ignore;
 }
 
 - (BookmarkButton*)buttonThatMouseIsIn {
   return buttonThatMouseIsIn_;
 }
 
 @end  // BookmarkBarFolderController