Move a bunch more code into the content namespace.

content/browser/web_contents/web_drag_source_mac.h

 // Copyright (c) 2012 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 <Cocoa/Cocoa.h>
 
 #include "base/file_path.h"
 #include "base/memory/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #include "googleurl/src/gurl.h"
 
+struct WebDropData;
+namespace content {
 class WebContentsImpl;
-struct WebDropData;
+}
 
 // A class that handles tracking and event processing for a drag and drop
 // originating from the content area.
 @interface WebDragSource : NSObject {
  @private
   // Our contents. Weak reference (owns or co-owns us).
-  WebContentsImpl* contents_;
+  content::WebContentsImpl* contents_;
 
   // The view from which the drag was initiated. Weak reference.
   NSView* contentsView_;
 
   // Our drop data. Should only be initialized once.
   scoped_ptr<WebDropData> dropData_;
 
   // The image to show as drag image. Can be nil.
   scoped_nsobject<NSImage> dragImage_;
 
@@ skipping 12 matching lines @@
   // The URL to download from for a drag-out download.
   GURL downloadURL_;
 
   // The file extension associated with the file drag, if any.
   NSString* fileExtension_;
 }
 
 // Initialize a WebDragSource object for a drag (originating on the given
 // contentsView and with the given dropData and pboard). Fill the pasteboard
 // with data types appropriate for dropData.
-- (id)initWithContents:(WebContentsImpl*)contents
+- (id)initWithContents:(content::WebContentsImpl*)contents
                   view:(NSView*)contentsView
               dropData:(const WebDropData*)dropData
                  image:(NSImage*)image
                 offset:(NSPoint)offset
             pasteboard:(NSPasteboard*)pboard
      dragOperationMask:(NSDragOperation)dragOperationMask;
 
 // Call when the web contents is gone.
 - (void)clearWebContentsView;
 
@@ skipping 17 matching lines @@
 // Drag moved; hook up to -draggedImage:movedTo:.
 - (void)moveDragTo:(NSPoint)screenPoint;
 
 // Call to drag a promised file to the given path (should be called before
 // -endDragAt:...); hook up to -namesOfPromisedFilesDroppedAtDestination:.
 // Returns the file name (not including path) of the file deposited (or which
 // will be deposited).
 - (NSString*)dragPromisedFileTo:(NSString*)path;
 
 @end