Added a TODO because I don't know the ICompilerProblem to use or create at the moment.
diff --git a/compiler.jx/src/org/apache/flex/compiler/internal/graph/GoogDepsWriter.java b/compiler.jx/src/org/apache/flex/compiler/internal/graph/GoogDepsWriter.java
index b53e126..bac500a 100644
--- a/compiler.jx/src/org/apache/flex/compiler/internal/graph/GoogDepsWriter.java
+++ b/compiler.jx/src/org/apache/flex/compiler/internal/graph/GoogDepsWriter.java
@@ -170,6 +170,7 @@
 		gd.className = className;
 		gd.filePath = getFilePath(className);
 		if(gd.filePath.isEmpty()) {
+			// TODO Send a ICompilerProblem instead.
 			throw new RuntimeException("Unable to find JavaScript filePath for class: " + className);
 		}
 		depMap.put(gd.className, gd);