Add an IPC method for Blink to call RapporService::RecordSample()

content/public/renderer/content_renderer_client.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_
 #define CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 273 matching lines @@
 
   // Returns true if the page at |url| can use Pepper Compositor APIs.
   virtual bool IsPluginAllowedToUseCompositorAPI(const GURL& url);
 
   // Returns true if dev channel APIs are available for plugins.
   virtual bool IsPluginAllowedToUseDevChannelAPIs();
 
   // Returns a user agent override specific for |url|, or empty string if
   // default user agent should be used.
   virtual std::string GetUserAgentOverrideForURL(const GURL& url);
+
+  // Allows renderer to record metrics to RAPPOR.
+  virtual void RecordRappor(
+      const std::string& metric, const std::string& sample);

[jam, 2015/04/02 16:24:14]

nit: for void methods, just define this inline with {}

[kojii, 2015/04/03 06:50:53]

Done.

 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_