Expose GetLoggingFileName in ContentBrowserClient.

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index b39cd980566a990c7e7b2fb036db52751fe9e0d1..e2b1af451874ae533cc4d2df1835e8b0381441c2 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -320,6 +320,10 @@ class CONTENT_EXPORT ContentBrowserClient {
   // Returns the default favicon.  The callee doesn't own the given bitmap.
   virtual const gfx::ImageSkia* GetDefaultFavicon();
 
+  // Returns the fully qualified path to the log file name, or an empty path.
+  // This function is used by the sandbox to allow write access to the log.
+  virtual base::FilePath GetLoggingFileName();
+
   // Allow the embedder to control if an AppCache can be used for the given url.
   // This is called on the IO thread.
   virtual bool AllowAppCache(const GURL& manifest_url,