Clear the clipboard closing Incognito window

ui/base/clipboard/clipboard_mac.mm

 // 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.
 
 #include "ui/base/clipboard/clipboard.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/memory/scoped_nsobject.h"
 #include "base/stl_util.h"
 #include "base/sys_string_conversions.h"
 #include "base/utf_string_conversions.h"
 #import "third_party/mozilla/NSPasteboard+Utils.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/clipboard/custom_data_helper.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h"
 #include "ui/gfx/size.h"
 
 namespace ui {
 
 namespace {
 
+// Source tag format type.
+NSString* const kSourceTagPboardType = @"org.chromium.source-tag-data";
+
 // Would be nice if this were in UTCoreTypes.h, but it isn't
 NSString* const kUTTypeURLName = @"public.url-name";
 
 // Tells us if WebKit was the last to write to the pasteboard. There's no
 // actual data associated with this type.
 NSString* const kWebSmartPastePboardType = @"NeXT smart paste pasteboard type";
 
 // Pepper custom data format type.
 NSString* const kPepperCustomDataPboardType =
     @"org.chromium.pepper-custom-data";
@@ skipping 44 matching lines @@
 }
 
 Clipboard::Clipboard() {
   DCHECK(CalledOnValidThread());
 }
 
 Clipboard::~Clipboard() {
   DCHECK(CalledOnValidThread());
 }
 
-void Clipboard::WriteObjects(Buffer buffer, const ObjectMap& objects) {
+void Clipboard::WriteObjectsImpl(Buffer buffer,
+                                 const ObjectMap& objects,
+                                 SourceTag tag) {
   DCHECK(CalledOnValidThread());
   DCHECK_EQ(buffer, BUFFER_STANDARD);
 
   NSPasteboard* pb = GetPasteboard();
   [pb declareTypes:[NSArray array] owner:nil];
 
   for (ObjectMap::const_iterator iter = objects.begin();
        iter != objects.end(); ++iter) {
     DispatchObject(static_cast<ObjectType>(iter->first), iter->second);
   }
+  WriteSourceTag(tag);
 }
 
 void Clipboard::WriteText(const char* text_data, size_t text_len) {
   std::string text_str(text_data, text_len);
   NSString *text = base::SysUTF8ToNSString(text_str);
   NSPasteboard* pb = GetPasteboard();
   [pb addTypes:[NSArray arrayWithObject:NSStringPboardType] owner:nil];
   [pb setString:text forType:NSStringPboardType];
 }
 
@@ skipping 91 matching lines @@
 
 void Clipboard::WriteData(const FormatType& format,
                           const char* data_data,
                           size_t data_len) {
   NSPasteboard* pb = GetPasteboard();
   [pb addTypes:[NSArray arrayWithObject:format.ToNSString()] owner:nil];
   [pb setData:[NSData dataWithBytes:data_data length:data_len]
       forType:format.ToNSString()];
 }
 
+void Clipboard::WriteSourceTag(SourceTag tag) {
+  if (tag != SourceTag()) {
+    ObjectMapParam binary = SourceTag2Binary(tag);
+    WriteData(GetSourceTagFormatType(), &binary[0], binary.size());
+  }
+}
+
 // Write an extra flavor that signifies WebKit was the last to modify the
 // pasteboard. This flavor has no data.
 void Clipboard::WriteWebSmartPaste() {
   NSPasteboard* pb = GetPasteboard();
   NSString* format = GetWebKitSmartPasteFormatType().ToNSString();
   [pb addTypes:[NSArray arrayWithObject:format] owner:nil];
   [pb setData:nil forType:format];
 }
 
 uint64 Clipboard::GetSequenceNumber(Buffer buffer) {
@@ skipping 178 matching lines @@
 }
 
 void Clipboard::ReadData(const FormatType& format, std::string* result) const {
   DCHECK(CalledOnValidThread());
   NSPasteboard* pb = GetPasteboard();
   NSData* data = [pb dataForType:format.ToNSString()];
   if ([data length])
     result->assign(static_cast<const char*>([data bytes]), [data length]);
 }
 
+Clipboard::SourceTag Clipboard::ReadSourceTag(Buffer buffer) const {
+  DCHECK_EQ(buffer, BUFFER_STANDARD);
+  std::string result;
+  ReadData(GetSourceTagFormatType(), &result);
+  return Binary2SourceTag(result);
+}
+
 // static
 Clipboard::FormatType Clipboard::GetFormatType(
     const std::string& format_string) {
   return FormatType::Deserialize(format_string);
 }
 
 // static
 const Clipboard::FormatType& Clipboard::GetUrlFormatType() {
   CR_DEFINE_STATIC_LOCAL(FormatType, type, (NSURLPboardType));
   return type;
@@ skipping 55 matching lines @@
   CR_DEFINE_STATIC_LOCAL(FormatType, type, (kWebCustomDataPboardType));
   return type;
 }
 
 // static
 const Clipboard::FormatType& Clipboard::GetPepperCustomDataFormatType() {
   CR_DEFINE_STATIC_LOCAL(FormatType, type, (kPepperCustomDataPboardType));
   return type;
 }
 
+// static
+const Clipboard::FormatType& Clipboard::GetSourceTagFormatType() {
+  CR_DEFINE_STATIC_LOCAL(FormatType, type, (kSourceTagPboardType));
+  return type;
+}
+
 }  // namespace ui