Adding handlers for user gesture callbacks.

Source/platform/UserGestureIndicator.cpp

Index: Source/platform/UserGestureIndicator.cpp
diff --git a/Source/platform/UserGestureIndicator.cpp b/Source/platform/UserGestureIndicator.cpp
index 03d219537a755790da17f7bf8602c9a560633c6b..94b24fe2de90ba8c00751404a9f84ad61a1ead90 100644
--- a/Source/platform/UserGestureIndicator.cpp
+++ b/Source/platform/UserGestureIndicator.cpp
@@ -29,11 +29,19 @@
 #include "wtf/Assertions.h"
 #include "wtf/CurrentTime.h"
 #include "wtf/MainThread.h"
+#include "wtf/Vector.h"
 
 namespace WebCore {
 
 namespace {
 
+static Vector<RefPtr<UserGestureHandler> >& handlers()
+{
+    ASSERT(isMainThread());
+    DEFINE_STATIC_LOCAL(Vector<RefPtr<UserGestureHandler> >, userGestureHandlers, ());
+    return userGestureHandlers;
+}
+
 // User gestures timeout in 1 second.
 const double userGestureTimeout = 1.0;
 
@@ -158,6 +166,11 @@ UserGestureIndicator::UserGestureIndicator(PassRefPtr<UserGestureToken> token)
             }
         }
         s_state = DefinitelyProcessingUserGesture;
+
+        while (handlers().size() > 0) {
+            handlers().last()->onGesture();
+            handlers().removeLast();
+        }
     }
 
     ASSERT(isDefinite(s_state));
@@ -194,6 +207,11 @@ UserGestureToken* UserGestureIndicator::currentToken()
     return s_topmostIndicator->m_token.get();
 }
 
+void UserGestureIndicator::addHandler(PassRefPtr<UserGestureHandler> handler)
+{
+    handlers().append(handler);
+}
+
 UserGestureIndicatorDisabler::UserGestureIndicatorDisabler()
     : m_savedState(UserGestureIndicator::s_state)
     , m_savedIndicator(UserGestureIndicator::s_topmostIndicator)