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

content/public/renderer/render_thread.h

Index: content/public/renderer/render_thread.h
diff --git a/content/public/renderer/render_thread.h b/content/public/renderer/render_thread.h
index 407128b33313dcb4be77e7a2815260d9c5721bf9..05121c54eb8c5544d2177b29b056a26932c255d8 100644
--- a/content/public/renderer/render_thread.h
+++ b/content/public/renderer/render_thread.h
@@ -97,6 +97,11 @@ class CONTENT_EXPORT RenderThread : virtual public ChildThread {
   // actions in chrome/tools/extract_actions.py.
   virtual void RecordComputedAction(const std::string& action) = 0;
 
+  // Sends over a metric and sample string to be recorded by RAPPOR.
+  virtual void RecordRappor(
+      const std::string& metric,
+      const std::string& sample) = 0;
+
   // Asks the host to create a block of shared memory for the renderer.
   // The shared memory allocated by the host is returned back.
   virtual scoped_ptr<base::SharedMemory> HostAllocateSharedMemoryBuffer(