Export WebSecurityOrigin's secure origin check.

Service Worker needs to enforce the
canAccessFeatureRequiringSecureOrigin check in
content/browser. Exporting the symbol so the embedder can link to
it. This is follow-up to r179341.

BUG=362214

Review URL: https://codereview.chromium.org/452793002

git-svn-id: svn://svn.chromium.org/blink/trunk@179843 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/public/web/WebSecurityOrigin.h

@@ -88,7 +88,7 @@ public:
     // cryptographically-authenticated server.
     //
     // [1] http://www.chromium.org/Home/chromium-security/security-faq#TOC-Which-origins-are-secure-
-    bool canAccessFeatureRequiringSecureOrigin(WebString& errorMessage) const;
+    BLINK_EXPORT bool canAccessFeatureRequiringSecureOrigin(WebString& errorMessage) const;
 
     // Returns a string representation of the WebSecurityOrigin.  The empty
     // WebSecurityOrigin is represented by "null".  The representation of a