Modify Pasteboard handling in OSExchangeData

ui/base/dragdrop/os_exchange_data_provider_mac.mm

Index: ui/base/dragdrop/os_exchange_data_provider_mac.mm
diff --git a/ui/base/dragdrop/os_exchange_data_provider_mac.mm b/ui/base/dragdrop/os_exchange_data_provider_mac.mm
index 030d0d084121808976d4e6ff1ec56bc82c9fd16e..5be2c7994894db9f8d33df4df0781fdede8dd5b6 100644
--- a/ui/base/dragdrop/os_exchange_data_provider_mac.mm
+++ b/ui/base/dragdrop/os_exchange_data_provider_mac.mm
@@ -40,16 +40,16 @@ bool OSExchangeDataProviderMac::DidOriginateFromRenderer() const {
 }
 
 void OSExchangeDataProviderMac::SetString(const base::string16& string) {
-  [pasteboard_->get() writeObjects:@[ base::SysUTF16ToNSString(string) ]];
+  [pasteboard_->get() setString:base::SysUTF16ToNSString(string)
+                        forType:NSPasteboardTypeString];
 }
 
 void OSExchangeDataProviderMac::SetURL(const GURL& url,
                                        const base::string16& title) {
-  NSURL* ns_url = [NSURL URLWithString:base::SysUTF8ToNSString(url.spec())];
-  [pasteboard_->get() writeObjects:@[ ns_url ]];
-
-  [pasteboard_->get() setString:base::SysUTF16ToNSString(title)
-                        forType:kCorePasteboardFlavorType_urln];
+  base::scoped_nsobject<NSPasteboardItem> item =
+      ClipboardUtil::PasteboardItemFromUrl(base::SysUTF8ToNSString(url.spec()),
+                                           base::SysUTF16ToNSString(title));
+  ui::ClipboardUtil::AddDataToPasteboard(pasteboard_->get(), item);
 }
 
 void OSExchangeDataProviderMac::SetFilename(const base::FilePath& path) {
@@ -71,23 +71,21 @@ void OSExchangeDataProviderMac::SetPickledData(
 
 bool OSExchangeDataProviderMac::GetString(base::string16* data) const {
   DCHECK(data);
-  NSArray* items =
-      [pasteboard_->get() readObjectsForClasses:@[ [NSString class] ]
-                                        options:@{}];
+  NSString* item = [pasteboard_->get() stringForType:NSPasteboardTypeString];
+  if (item) {
+    *data = base::SysNSStringToUTF16(item);
+    return true;
+  }
 
   // There was no NSString, check for an NSURL.
-  if ([items count] == 0) {
-    GURL url;
-    base::string16 title;
-    bool result =
-        GetURLAndTitle(OSExchangeData::DO_NOT_CONVERT_FILENAMES, &url, &title);
-    if (result)
-      *data = base::UTF8ToUTF16(url.spec());
-    return result;
-  }
+  GURL url;
+  base::string16 title;
+  bool result =
+      GetURLAndTitle(OSExchangeData::DO_NOT_CONVERT_FILENAMES, &url, &title);
+  if (result)
+    *data = base::UTF8ToUTF16(url.spec());
 
-  *data = base::SysNSStringToUTF16([items objectAtIndex:0]);
-  return true;
+  return result;
 }
 
 bool OSExchangeDataProviderMac::GetURLAndTitle(
@@ -96,29 +94,29 @@ bool OSExchangeDataProviderMac::GetURLAndTitle(
     base::string16* title) const {
   DCHECK(url);
   DCHECK(title);
-  NSArray* items =
-      [pasteboard_->get() readObjectsForClasses:@[ [NSURL class] ] options:@{}];
-  if ([items count] == 0)
-    return false;
 
-  NSURL* ns_url = [items objectAtIndex:0];
-
-  if (policy == OSExchangeData::DO_NOT_CONVERT_FILENAMES) {
-    // If the URL matches a filename, assume that it came from SetFilename().
-    // Don't return it if we are not supposed to convert filename to URL.
-    NSArray* paths =
-        [pasteboard_->get() propertyListForType:NSFilenamesPboardType];
-    NSString* url_path = [[ns_url path] stringByStandardizingPath];
-    for (NSString* path in paths) {
-      if ([[path stringByStandardizingPath] isEqualToString:url_path])
-        return false;
-    }
+  NSArray* urlArray = nil;
+  NSArray* titleArray = nil;
+  if (ClipboardUtil::URLsAndTitlesFromPasteboard(pasteboard_->get(), &urlArray,
+                                                 &titleArray)) {
+    *url = GURL(base::SysNSStringToUTF8([urlArray firstObject]));
+    *title = base::SysNSStringToUTF16([titleArray firstObject]);
+    return true;
   }
 
-  *url = GURL([[ns_url absoluteString] UTF8String]);
-  *title = base::SysNSStringToUTF16(
-      [pasteboard_->get() stringForType:kCorePasteboardFlavorType_urln]);
-  return true;
+  // If there are no URLS, try to convert a filename to a URL if the policy
+  // allows it. The title remains blank.
+  base::FilePath path;
+  if (policy != OSExchangeData::DO_NOT_CONVERT_FILENAMES &&
+      GetFilename(&path)) {
+    NSURL* fileUrl =
+        [NSURL fileURLWithPath:base::SysUTF8ToNSString(path.value())];
+    *url =
+        GURL([[fileUrl absoluteString] stringByStandardizingPath].UTF8String);
+    return true;
+  }
+
+  return false;
 }
 
 bool OSExchangeDataProviderMac::GetFilename(base::FilePath* path) const {
@@ -151,8 +149,8 @@ bool OSExchangeDataProviderMac::GetPickledData(
 }
 
 bool OSExchangeDataProviderMac::HasString() const {
-  NSArray* classes = @[ [NSString class] ];
-  return [pasteboard_->get() canReadObjectForClasses:classes options:nil];
+  base::string16 string;
+  return GetString(&string);
 }
 
 bool OSExchangeDataProviderMac::HasURL(