Spelling fixes e to i.

pkg/compiler/lib/src/js_backend/custom_elements_analysis.dart

Index: pkg/compiler/lib/src/js_backend/custom_elements_analysis.dart
diff --git a/pkg/compiler/lib/src/js_backend/custom_elements_analysis.dart b/pkg/compiler/lib/src/js_backend/custom_elements_analysis.dart
index cedeeedb1164b843fc28e20f05a1d27c01c19575..29c6db81766da863a63413eae79d428853c5b41a 100644
--- a/pkg/compiler/lib/src/js_backend/custom_elements_analysis.dart
+++ b/pkg/compiler/lib/src/js_backend/custom_elements_analysis.dart
@@ -205,7 +205,7 @@ class CustomElementsAnalysisJoin {
           escapingConstructors
               .forEach(_backendUsageBuilder.registerGlobalFunctionDependency);
         }
-        // Force the generaton of the type constant that is the key to an entry
+        // Force the generation of the type constant that is the key to an entry
         // in the generated table.
         ConstantValue constant = _makeTypeConstant(cls);
         impactBuilder