Removes dartc reliance on its own libraries, now can be targeted at any implementation's libraries

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

Index: compiler/java/com/google/dart/compiler/resolver/ResolutionContext.java
diff --git a/compiler/java/com/google/dart/compiler/resolver/ResolutionContext.java b/compiler/java/com/google/dart/compiler/resolver/ResolutionContext.java
index 4a88a5f93aab4f0480ea50c0922f6c0186a09e2a..63ae895e43907dbe0e38ac585210b1e6af962a01 100644
--- a/compiler/java/com/google/dart/compiler/resolver/ResolutionContext.java
+++ b/compiler/java/com/google/dart/compiler/resolver/ResolutionContext.java
@@ -7,11 +7,14 @@ import com.google.common.annotations.VisibleForTesting;
 import com.google.dart.compiler.DartCompilationError;
 import com.google.dart.compiler.DartCompilerContext;
 import com.google.dart.compiler.ErrorCode;
+import com.google.dart.compiler.ErrorSeverity;
+import com.google.dart.compiler.Source;
+import com.google.dart.compiler.SystemLibraryManager;
+import com.google.dart.compiler.ast.ASTVisitor;
 import com.google.dart.compiler.ast.DartFunctionExpression;
 import com.google.dart.compiler.ast.DartFunctionTypeAlias;
 import com.google.dart.compiler.ast.DartIdentifier;
 import com.google.dart.compiler.ast.DartNode;
-import com.google.dart.compiler.ast.ASTVisitor;
 import com.google.dart.compiler.ast.DartPropertyAccess;
 import com.google.dart.compiler.ast.DartTypeNode;
 import com.google.dart.compiler.ast.LibraryUnit;
@@ -37,7 +40,8 @@ public class ResolutionContext implements ResolutionErrorListener {
   private Scope scope;
   private final DartCompilerContext context;
   private final CoreTypeProvider typeProvider;
-
+  private final boolean suppressSdkWarnings;
+  
   ResolutionContext(String name, LibraryElement library, DartCompilerContext context,
                     CoreTypeProvider typeProvider) {
     this(new Scope(name, library), context, typeProvider);
@@ -49,6 +53,8 @@ public class ResolutionContext implements ResolutionErrorListener {
     this.scope = scope;
     this.context = context;
     this.typeProvider = typeProvider;
+    this.suppressSdkWarnings = context.getCompilerConfiguration().getCompilerOptions()
+        .suppressSdkWarnings();
   }
 
   ResolutionContext(LibraryUnit unit, DartCompilerContext context, CoreTypeProvider typeProvider) {
@@ -350,6 +356,12 @@ public class ResolutionContext implements ResolutionErrorListener {
   }
 
   public void onError(SourceInfo sourceInfo, ErrorCode errorCode, Object... arguments) {
+    if (suppressSdkWarnings && errorCode.getErrorSeverity() == ErrorSeverity.WARNING) {
+      Source source = sourceInfo.getSource();
+      if (source != null && SystemLibraryManager.isDartUri(source.getUri())) {
+        return;
+      }
+    }
     context.onError(new DartCompilationError(sourceInfo, errorCode, arguments));
   }