Add explicit @Inject.

Revision created by MOE tool push_codebase.
MOE_MIGRATION=4907
diff --git a/extensions/servlet/src/com/google/inject/servlet/InternalServletModule.java b/extensions/servlet/src/com/google/inject/servlet/InternalServletModule.java
index 9bd650d..8043ca9 100644
--- a/extensions/servlet/src/com/google/inject/servlet/InternalServletModule.java
+++ b/extensions/servlet/src/com/google/inject/servlet/InternalServletModule.java
@@ -19,6 +19,7 @@
 import static com.google.inject.servlet.ServletScopes.SESSION;
 
 import com.google.inject.AbstractModule;
+import com.google.inject.Inject;
 import com.google.inject.Provider;
 import com.google.inject.Provides;
 import com.google.inject.Singleton;
@@ -51,6 +52,8 @@
   static class BackwardsCompatibleServletContextProvider implements Provider<ServletContext> {
     private ServletContext injectedServletContext;
 
+    @Inject BackwardsCompatibleServletContextProvider() {}
+
     // This setter is called by the GuiceServletContextListener
     void set(ServletContext injectedServletContext) {
       this.injectedServletContext = injectedServletContext;