Avoid inlining constants that are used via a deferred import.

sdk/lib/_internal/compiler/implementation/ssa/value_range_analyzer.dart

Index: sdk/lib/_internal/compiler/implementation/ssa/value_range_analyzer.dart
diff --git a/sdk/lib/_internal/compiler/implementation/ssa/value_range_analyzer.dart b/sdk/lib/_internal/compiler/implementation/ssa/value_range_analyzer.dart
index f8dcf42c09fe92fafc134aed095959b6c5cd3339..f58002930542c2b2d5ecb7d53e5696386a7f60cf 100644
--- a/sdk/lib/_internal/compiler/implementation/ssa/value_range_analyzer.dart
+++ b/sdk/lib/_internal/compiler/implementation/ssa/value_range_analyzer.dart
@@ -670,9 +670,15 @@ class SsaValueRangeAnalyzer extends HBaseVisitor implements OptimizationPhase {
     return range;
   }
 
-  Range visitConstant(HConstant constant) {
-    if (!constant.isInteger(compiler)) return info.newUnboundRange();
-    NumConstant constantNum = constant.constant;
+  Range visitConstant(HConstant hConstant) {
+    if (!hConstant.isInteger(compiler)) return info.newUnboundRange();
+    Constant constant = hConstant.constant;
+    NumConstant constantNum;
+    if (constant is DeferredConstant) {
+      constantNum = constant.referenced;
+    } else {
+      constantNum = constant;
+    }
     if (constantNum.isMinusZero) constantNum = new IntConstant(0);
     Value value = info.newIntValue(constantNum.value);
     return info.newNormalizedRange(value, value);