Make ActionLookupData a SkyKey. Should save some memory.

PiperOrigin-RevId: 185694489
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/SkyFunctions.java b/src/main/java/com/google/devtools/build/lib/skyframe/SkyFunctions.java
index 04ff12c..a80d761 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/SkyFunctions.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/SkyFunctions.java
@@ -14,6 +14,7 @@
 package com.google.devtools.build.lib.skyframe;
 
 import com.google.common.base.Predicate;
+import com.google.devtools.build.lib.actions.ActionLookupData;
 import com.google.devtools.build.skyframe.SkyFunctionName;
 import com.google.devtools.build.skyframe.SkyKey;
 
@@ -86,8 +87,7 @@
   public static final SkyFunctionName CONFIGURATION_FRAGMENT =
       SkyFunctionName.create("CONFIGURATION_FRAGMENT");
   public static final SkyFunctionName ARTIFACT = SkyFunctionName.create("ARTIFACT");
-  public static final SkyFunctionName ACTION_EXECUTION =
-      SkyFunctionName.create("ACTION_EXECUTION");
+  public static final SkyFunctionName ACTION_EXECUTION = ActionLookupData.NAME;
   public static final SkyFunctionName RECURSIVE_FILESYSTEM_TRAVERSAL =
       SkyFunctionName.create("RECURSIVE_DIRECTORY_TRAVERSAL");
   public static final SkyFunctionName FILESET_ENTRY = SkyFunctionName.create("FILESET_ENTRY");