Convert ChromeViewHostMsg_UpdatedCacheStats to use mojo.

chrome/renderer/chrome_render_thread_observer.cc

Index: chrome/renderer/chrome_render_thread_observer.cc
diff --git a/chrome/renderer/chrome_render_thread_observer.cc b/chrome/renderer/chrome_render_thread_observer.cc
index 996518506ab0188bad786eda5dea084785c04030..7da3f1933d543974b693e727c699195cfc6125c0 100644
--- a/chrome/renderer/chrome_render_thread_observer.cc
+++ b/chrome/renderer/chrome_render_thread_observer.cc
@@ -28,6 +28,7 @@
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
+#include "chrome/common/cache_stats_recorder.mojom.h"
 #include "chrome/common/child_process_logging.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/field_trial_recorder.mojom.h"
@@ -117,9 +118,10 @@ class RendererResourceDelegate : public content::ResourceDispatcherDelegate {
   void InformHostOfCacheStats() {
     WebCache::UsageStats stats;
     WebCache::getUsageStats(&stats);
-    RenderThread::Get()->Send(new ChromeViewHostMsg_UpdatedCacheStats(
-        static_cast<uint64_t>(stats.capacity),
-        static_cast<uint64_t>(stats.size)));
+    chrome::mojom::CacheStatsRecorderPtr cache_stats_recorder;

[Sam McNally, 2017/01/24 04:06:15]

This one feels like the connection should be reused.

[nigeltao1, 2017/02/02 05:20:59]

Done.

+    RenderThread::Get()->GetRemoteInterfaces()->GetInterface(
+        &cache_stats_recorder);
+    cache_stats_recorder->RecordCacheStats(stats.capacity, stats.size);
   }
 
   base::WeakPtrFactory<RendererResourceDelegate> weak_factory_;