Convert RapporRecorder to use mojo.

chrome/renderer/chrome_content_renderer_client.h

Index: chrome/renderer/chrome_content_renderer_client.h
diff --git a/chrome/renderer/chrome_content_renderer_client.h b/chrome/renderer/chrome_content_renderer_client.h
index 2a834f1936f6eafa12b49864c248c30ba0cc0052..df97d07aaad45e23710e32082e006013c284bad1 100644
--- a/chrome/renderer/chrome_content_renderer_client.h
+++ b/chrome/renderer/chrome_content_renderer_client.h
@@ -16,6 +16,7 @@
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/strings/string16.h"
+#include "components/rappor/public/interfaces/rappor_recorder.mojom.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "v8/include/v8.h"
@@ -227,6 +228,8 @@ class ChromeContentRendererClient : public content::ContentRendererClient {
                             blink::WebPluginParams* params);
 #endif
 
+  rappor::mojom::RapporRecorderPtr rappor_recorder_;
+
   std::unique_ptr<ChromeRenderThreadObserver> chrome_observer_;
   std::unique_ptr<web_cache::WebCacheImpl> web_cache_impl_;