Enable clear cache/cookies support in developer tools

content/browser/content_browser_client.h

Index: content/browser/content_browser_client.h
diff --git a/content/browser/content_browser_client.h b/content/browser/content_browser_client.h
index 84ddae1a056a12df1c630a1a6d4d67e281acbfab..b8fde9383beb0e7c07c7c15ed6ea77aaf75248d9 100644
--- a/content/browser/content_browser_client.h
+++ b/content/browser/content_browser_client.h
@@ -238,6 +238,12 @@ class ContentBrowserClient {
       crypto::CryptoModuleBlockingPasswordDelegate* GetCryptoPasswordDelegate(
           const GURL& url) = 0;
 #endif
+
+  // Clears browser cache.
+  virtual void ClearCache(RenderViewHost* rvh) = 0;
+
+  // Clears browser cookies.
+  virtual void ClearCookies(RenderViewHost* rvh) = 0;
 };
 
 }  // namespace content