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

content/public/renderer/content_renderer_client.h

Index: content/public/renderer/content_renderer_client.h
diff --git a/content/public/renderer/content_renderer_client.h b/content/public/renderer/content_renderer_client.h
index ca4d51db881f8d8310f9e2fac5d4ce8c79d77974..a3398b62c1c97cf11db1c7c0aad8114ca10c1df8 100644
--- a/content/public/renderer/content_renderer_client.h
+++ b/content/public/renderer/content_renderer_client.h
@@ -291,6 +291,10 @@ class CONTENT_EXPORT ContentRendererClient {
   // 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