clang fails compile on aura drag and drop code

clang check for non-trivial destructors in headers.

BUG=none
TEST=compiles on mac clang
R=varunjain@chromium.org

Review URL: http://codereview.chromium.org/8558010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110799 0039d316-1c4b-4281-b951-d872f2087c98

ui/base/dragdrop/os_exchange_data_provider_aura.cc

@@ -12,6 +12,8 @@ namespace ui {
 
 OSExchangeDataProviderAura::OSExchangeDataProviderAura() : formats_(0) {}
 
+OSExchangeDataProviderAura::~OSExchangeDataProviderAura() {}
+
 void OSExchangeDataProviderAura::SetString(const string16& data) {
   string_ = data;
   formats_ |= OSExchangeData::STRING;

ui/base/dragdrop/os_exchange_data_provider_aura.h

@@ -20,8 +20,7 @@ namespace ui {
 class UI_EXPORT OSExchangeDataProviderAura : public OSExchangeData::Provider {
  public:
   OSExchangeDataProviderAura();
-
-  virtual ~OSExchangeDataProviderAura() {}
+  virtual ~OSExchangeDataProviderAura();
 
   // Overridden from OSExchangeData::Provider:
   virtual void SetString(const string16& data) OVERRIDE;