Use StringBuilder::appendLiteral() / StringBuilder::append(char) when possible

Source/core/inspector/InspectorApplicationCacheAgent.cpp

Index: Source/core/inspector/InspectorApplicationCacheAgent.cpp
diff --git a/Source/core/inspector/InspectorApplicationCacheAgent.cpp b/Source/core/inspector/InspectorApplicationCacheAgent.cpp
index eee0a546b1967dd538a729f3fc187eadd4d2e9d5..216381315d8c74bd9d50628a34de6dd95d92a6ea 100644
--- a/Source/core/inspector/InspectorApplicationCacheAgent.cpp
+++ b/Source/core/inspector/InspectorApplicationCacheAgent.cpp
@@ -181,19 +181,19 @@ PassRefPtr<TypeBuilder::ApplicationCache::ApplicationCacheResource> InspectorApp
 {
     StringBuilder builder;
     if (resourceInfo.m_isMaster)
-        builder.append("Master ");
+        builder.appendLiteral("Master ");
 
     if (resourceInfo.m_isManifest)
-        builder.append("Manifest ");
+        builder.appendLiteral("Manifest ");
 
     if (resourceInfo.m_isFallback)
-        builder.append("Fallback ");
+        builder.appendLiteral("Fallback ");
 
     if (resourceInfo.m_isForeign)
-        builder.append("Foreign ");
+        builder.appendLiteral("Foreign ");
 
     if (resourceInfo.m_isExplicit)
-        builder.append("Explicit ");
+        builder.appendLiteral("Explicit ");
 
     RefPtr<TypeBuilder::ApplicationCache::ApplicationCacheResource> value = TypeBuilder::ApplicationCache::ApplicationCacheResource::create()
         .setUrl(resourceInfo.m_resource.string())