Add support for setting password value gated on user's gesture in a page

Source/platform/UserGestureIndicator.cpp

Index: Source/platform/UserGestureIndicator.cpp
diff --git a/Source/platform/UserGestureIndicator.cpp b/Source/platform/UserGestureIndicator.cpp
index 03d219537a755790da17f7bf8602c9a560633c6b..dbebd06a9ddc724f81f454e1af6366d3c0ae55fb 100644
--- a/Source/platform/UserGestureIndicator.cpp
+++ b/Source/platform/UserGestureIndicator.cpp
@@ -112,6 +112,7 @@ static bool isDefinite(ProcessingUserGestureState state)
 
 ProcessingUserGestureState UserGestureIndicator::s_state = DefinitelyNotProcessingUserGesture;
 UserGestureIndicator* UserGestureIndicator::s_topmostIndicator = 0;
+bool UserGestureIndicator::s_processedUserGestureInPast = false;
 
 UserGestureIndicator::UserGestureIndicator(ProcessingUserGestureState state)
     : m_previousState(s_state)
@@ -129,6 +130,8 @@ UserGestureIndicator::UserGestureIndicator(ProcessingUserGestureState state)
             m_token = s_topmostIndicator->currentToken();
         }
         s_state = state;
+        if (state == DefinitelyProcessingNewUserGesture || state == DefinitelyProcessingUserGesture)
+            s_processedUserGestureInPast = true;
     }
 
     if (state == DefinitelyProcessingNewUserGesture)
@@ -158,6 +161,7 @@ UserGestureIndicator::UserGestureIndicator(PassRefPtr<UserGestureToken> token)
             }
         }
         s_state = DefinitelyProcessingUserGesture;
+        s_processedUserGestureInPast = true;
     }
 
     ASSERT(isDefinite(s_state));
@@ -194,6 +198,19 @@ UserGestureToken* UserGestureIndicator::currentToken()
     return s_topmostIndicator->m_token.get();
 }
 
+void UserGestureIndicator::clearProcessedUserGestureInPast()
+{
+    if (isMainThread())
+        s_processedUserGestureInPast = true;
+}
+
+bool UserGestureIndicator::processedUserGestureInPast()
+{
+    if (!isMainThread())
+        return false;
+    return s_processedUserGestureInPast;
+}
+
 UserGestureIndicatorDisabler::UserGestureIndicatorDisabler()
     : m_savedState(UserGestureIndicator::s_state)
     , m_savedIndicator(UserGestureIndicator::s_topmostIndicator)