Add renderer memory metrics

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 3b96a1577756971a9e423e4953ee1101aaf440de..f35c8bee70a7857d04bed79794dab665a612523f 100644
--- a/chrome/renderer/chrome_render_thread_observer.cc
+++ b/chrome/renderer/chrome_render_thread_observer.cc
@@ -290,6 +290,24 @@ bool ChromeRenderThreadObserver::OnControlMessageReceived(
 
 void ChromeRenderThreadObserver::OnRenderProcessShutdown() {
   visited_link_slave_.reset();
+
+  content::RendererMemoryMetrics memory_metrics;
+  content::RenderThread::Get()->GetRendererMemoryMetrics(&memory_metrics);
+  UMA_HISTOGRAM_MEMORY_KB("Renderer.Memory.Shutdown.PartitionAllocKB",
+                          memory_metrics.partition_alloc_kb);
+  UMA_HISTOGRAM_MEMORY_KB("Renderer.Memory.Shutdown.BlinkGCKB",
+                          memory_metrics.blink_gc_kb);
+  UMA_HISTOGRAM_MEMORY_MB("Renderer.Memory.Shutdown.MallocMB",
+                          memory_metrics.malloc_mb);
+  UMA_HISTOGRAM_MEMORY_KB("Renderer.Memory.Shutdown.DiscardableKB",
+                          memory_metrics.discardable_kb);
+  UMA_HISTOGRAM_MEMORY_MB("Renderer.Memory.Shutdown.V8MainThreadIsolateMB",
+                          memory_metrics.v8_main_thread_isolate_mb);
+  UMA_HISTOGRAM_MEMORY_MB("Renderer.Memory.Shutdown.TotalAllocatedMB",
+                          memory_metrics.total_allocated_mb);
+  UMA_HISTOGRAM_MEMORY_MB(

[haraken, 2016/12/12 11:32:27]

I might prefer unifying the units to MB though. It's confusing some allocators
report MB whereas others report KB.

[keishi, 2017/01/06 11:08:27]

Unified new UMAs to MB. Leaving the existing PurgeAndSuspend UMAs as is because
we don't want to split the data.

+      "Renderer.Memory.Shutdown.NonDiscardableTotalAllocatedMB",
+      memory_metrics.non_discardable_total_allocated_mb);
 }
 
 void ChromeRenderThreadObserver::OnFieldTrialGroupFinalized(