Allow Skyframe graph lookups and value retrievals to throw InterruptedException.

The only place we now don't handle InterruptedException is in the action graph created after analysis, since I'm not sure that will be around for that much longer.

--
MOS_MIGRATED_REVID=130327770
diff --git a/src/main/java/com/google/devtools/build/lib/actions/ActionCacheChecker.java b/src/main/java/com/google/devtools/build/lib/actions/ActionCacheChecker.java
index 86cbd0a..b96a9e4 100644
--- a/src/main/java/com/google/devtools/build/lib/actions/ActionCacheChecker.java
+++ b/src/main/java/com/google/devtools/build/lib/actions/ActionCacheChecker.java
@@ -27,13 +27,11 @@
 import com.google.devtools.build.lib.events.EventKind;
 import com.google.devtools.build.lib.util.Preconditions;
 import com.google.devtools.build.lib.vfs.PathFragment;
-
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-
 import javax.annotation.Nullable;
 
 /**
@@ -242,7 +240,7 @@
 
   @Nullable
   public Iterable<Artifact> getCachedInputs(Action action, PackageRootResolver resolver)
-      throws PackageRootResolutionException {
+      throws PackageRootResolutionException, InterruptedException {
     ActionCache.Entry entry = getCacheEntry(action);
     if (entry == null || entry.isCorrupted()) {
       return ImmutableList.of();