Have Frame::script() return a reference

Source/core/fetch/ResourceFetcher.cpp

Index: Source/core/fetch/ResourceFetcher.cpp
diff --git a/Source/core/fetch/ResourceFetcher.cpp b/Source/core/fetch/ResourceFetcher.cpp
index cb24e19358d4d4cc1dac7828680d5fba5db91627..4619b687ae461a952b4de2b2ef6aeb8b65001e7c 100644
--- a/Source/core/fetch/ResourceFetcher.cpp
+++ b/Source/core/fetch/ResourceFetcher.cpp
@@ -386,7 +386,7 @@ bool ResourceFetcher::canRequest(Resource::Type type, const KURL& url, const Res
     }
 
     // FIXME: Convert this to check the isolated world's Content Security Policy once webkit.org/b/104520 is solved.
-    bool shouldBypassMainWorldContentSecurityPolicy = (frame() && frame()->script()->shouldBypassMainWorldContentSecurityPolicy()) || (options.contentSecurityPolicyOption == DoNotCheckContentSecurityPolicy);
+    bool shouldBypassMainWorldContentSecurityPolicy = (frame() && frame()->script().shouldBypassMainWorldContentSecurityPolicy()) || (options.contentSecurityPolicyOption == DoNotCheckContentSecurityPolicy);
 
     // Some types of resources can be loaded only from the same origin. Other
     // types of resources, like Images, Scripts, and CSS, can be loaded from