linux_aura: Fix dragging files into Dropbox.

Some Linux file managers will set both URI list representation and the
plain text representation when dragging files. Chrome interprets this as
a chunk of text and a file, and offers both to the renderer. This broke
the javascript on the Dropbox website.

This ports the hack in WebDragDestGtk::OnDragDataReceived() to
linux_aura. This hack prevents us from offering the String type when we
also have a URI list.

BUG=318796

Review URL: https://codereview.chromium.org/133053003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244315 0039d316-1c4b-4281-b951-d872f2087c98

ui/base/dragdrop/os_exchange_data_provider_aurax11.cc

@@ -175,6 +175,13 @@ void OSExchangeDataProviderAuraX11::SetPickledData(
 }
 
 bool OSExchangeDataProviderAuraX11::GetString(base::string16* result) const {
+  if (HasFile()) {
+    // Various Linux file managers both pass a list of file:// URIs and set the
+    // string representation to the URI. We explicitly don't want to return use
+    // this representation.
+    return false;
+  }
+
   std::vector< ::Atom> text_atoms = ui::GetTextAtomsFrom(&atom_cache_);
   std::vector< ::Atom> requested_types;
   ui::GetAtomIntersection(text_atoms, GetTargets(), &requested_types);
@@ -292,7 +299,7 @@ bool OSExchangeDataProviderAuraX11::HasString() const {
   std::vector< ::Atom> text_atoms = ui::GetTextAtomsFrom(&atom_cache_);
   std::vector< ::Atom> requested_types;
   ui::GetAtomIntersection(text_atoms, GetTargets(), &requested_types);
-  return !requested_types.empty();
+  return !requested_types.empty() && !HasFile();
 }
 
 bool OSExchangeDataProviderAuraX11::HasURL() const {

ui/base/dragdrop/os_exchange_data_provider_aurax11_unittest.cc

@@ -96,4 +96,24 @@ TEST_F(OSExchangeDataProviderAuraX11Test, URIListWithBoth) {
   EXPECT_EQ(kGoogleURL, out_gurl.spec());
 }
 
+TEST_F(OSExchangeDataProviderAuraX11Test, OnlyStringURLIsUnfiltered) {
+  const base::string16 file_url = base::UTF8ToUTF16(kFileURL);
+  provider.SetString(file_url);
+
+  EXPECT_TRUE(provider.HasString());
+  EXPECT_FALSE(provider.HasURL());
+}
+
+TEST_F(OSExchangeDataProviderAuraX11Test, StringAndURIListFilterString) {
+  const base::string16 file_url = base::UTF8ToUTF16(kFileURL);
+  provider.SetString(file_url);
+  AddURLList(kFileURL);
+
+  EXPECT_FALSE(provider.HasString());
+  base::string16 out_str;
+  EXPECT_FALSE(provider.GetString(&out_str));
+
+  EXPECT_TRUE(provider.HasFile());
+}
+
 }  // namespace ui