[Mac] "Refactor" DraggableButton into a mixin and impl.

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

 // Copyright (c) 2011 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_controller.h"
 
 #include "base/mac/mac_util.h"
 #include "base/metrics/histogram.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_editor.h"
@@ skipping 319 matching lines @@
 
 - (void)awakeFromNib {
   // We default to NOT open, which means height=0.
   DCHECK([[self view] isHidden]);  // Hidden so it's OK to change.
 
   // Set our initial height to zero, since that is what the superview
   // expects.  We will resize ourselves open later if needed.
   [[self view] setFrame:NSMakeRect(0, 0, initialWidth_, 0)];
 
   // Complete init of the "off the side" button, as much as we can.
-  [offTheSideButton_ setDraggable:NO];
-  [offTheSideButton_ setActsOnMouseDown:YES];
+  [offTheSideButton_.draggableButton setDraggable:NO];
+  [offTheSideButton_.draggableButton setActsOnMouseDown:YES];
 
   // We are enabled by default.
   barIsEnabled_ = YES;
 
   // Remember the original sizes of the 'no items' and 'import bookmarks'
   // fields to aid in resizing when the window frame changes.
   originalNoItemsRect_ = [[buttonView_ noItemTextfield] frame];
   originalImportBookmarksRect_ = [[buttonView_ importBookmarksButton] frame];
 
   // To make life happier when the bookmark bar is floating, the chevron is a
@@ skipping 757 matching lines @@
   if (themeProvider) {
     NSColor* color =
         themeProvider->GetNSColor(ThemeService::COLOR_BOOKMARK_TEXT,
                                   true);
     [cell setTextColor:color];
   }
 
   if (node->is_folder()) {
     [button setTarget:self];
     [button setAction:@selector(openBookmarkFolderFromButton:)];
-    [button setActsOnMouseDown:YES];
+    [[button draggableButton] setActsOnMouseDown:YES];
     // If it has a title, and it will be truncated, show full title in
     // tooltip.
     NSString* title = base::SysUTF16ToNSString(node->GetTitle());
     if ([title length] &&
         [[button cell] cellSize].width > bookmarks::kDefaultBookmarkWidth) {
       [button setToolTip:title];
     }
   } else {
     // Make the button do something
     [button setTarget:self];
@@ skipping 57 matching lines @@
     return;
   }
 
   // TODO(jrg): remove duplicate code
   NSCell* cell = [self cellForBookmarkNode:bookmarkModel_->other_node()];
   int ignored = 0;
   NSRect frame = [self frameForBookmarkButtonFromCell:cell xOffset:&ignored];
   frame.origin.x = [[self buttonView] bounds].size.width - frame.size.width;
   frame.origin.x -= bookmarks::kBookmarkHorizontalPadding;
   BookmarkButton* button = [[BookmarkButton alloc] initWithFrame:frame];
-  [button setDraggable:NO];
-  [button setActsOnMouseDown:YES];
+  [[button draggableButton] setDraggable:NO];
+  [[button draggableButton] setActsOnMouseDown:YES];
   otherBookmarksButton_.reset(button);
   view_id_util::SetID(button, VIEW_ID_OTHER_BOOKMARKS);
 
   // Make sure this button, like all other BookmarkButtons, lives
   // until the end of the current event loop.
   [[button retain] autorelease];
 
   // Peg at right; keep same height as bar.
   [button setAutoresizingMask:(NSViewMinXMargin)];
   [button setCell:cell];
@@ skipping 1272 matching lines @@
 // to minimize touching the object passed in (likely a mock).
 - (void)setButtonContextMenu:(id)menu {
   buttonContextMenu_ = menu;
 }
 
 - (void)setIgnoreAnimations:(BOOL)ignore {
   ignoreAnimations_ = ignore;
 }
 
 @end