Add thread affinity and ASSERT() for same-thread restriction to WTF::Function

third_party/WebKit/Source/platform/ContentSettingCallbacks.cpp

Index: third_party/WebKit/Source/platform/ContentSettingCallbacks.cpp
diff --git a/third_party/WebKit/Source/platform/ContentSettingCallbacks.cpp b/third_party/WebKit/Source/platform/ContentSettingCallbacks.cpp
index 4f0a8b4e1d29b07321535fcd4556f306bca212a9..1102c6c890616879336ea5a060e55e62bf44db98 100644
--- a/third_party/WebKit/Source/platform/ContentSettingCallbacks.cpp
+++ b/third_party/WebKit/Source/platform/ContentSettingCallbacks.cpp
@@ -32,12 +32,12 @@
 
 namespace blink {
 
-PassOwnPtr<ContentSettingCallbacks> ContentSettingCallbacks::create(PassOwnPtr<Closure> allowed, PassOwnPtr<Closure> denied)
+PassOwnPtr<ContentSettingCallbacks> ContentSettingCallbacks::create(PassOwnPtr<SameThreadClosure> allowed, PassOwnPtr<SameThreadClosure> denied)
 {
     return adoptPtr(new ContentSettingCallbacks(std::move(allowed), std::move(denied)));
 }
 
-ContentSettingCallbacks::ContentSettingCallbacks(PassOwnPtr<Closure> allowed, PassOwnPtr<Closure> denied)
+ContentSettingCallbacks::ContentSettingCallbacks(PassOwnPtr<SameThreadClosure> allowed, PassOwnPtr<SameThreadClosure> denied)
     : m_allowed(std::move(allowed))
     , m_denied(std::move(denied))
 {