Change the compiler project's save actions settings to organize imports on save.

compiler/java/com/google/dart/compiler/resolver/Resolver.java

Index: compiler/java/com/google/dart/compiler/resolver/Resolver.java
===================================================================
--- compiler/java/com/google/dart/compiler/resolver/Resolver.java	(revision 11361)
+++ compiler/java/com/google/dart/compiler/resolver/Resolver.java	(working copy)
@@ -46,7 +46,6 @@
 import com.google.dart.compiler.ast.DartNativeBlock;
 import com.google.dart.compiler.ast.DartNewExpression;
 import com.google.dart.compiler.ast.DartNode;
-import com.google.dart.compiler.ast.DartNodeWithMetadata;
 import com.google.dart.compiler.ast.DartParameter;
 import com.google.dart.compiler.ast.DartParameterizedTypeNode;
 import com.google.dart.compiler.ast.DartPartOfDirective;
@@ -88,7 +87,6 @@
 import java.util.Iterator;
 import java.util.List;
 import java.util.Set;
-
 /**
  * Resolves unqualified elements in a compilation unit.
  */