Add renderer memory metrics

chrome/renderer/chrome_render_frame_observer.cc

Index: chrome/renderer/chrome_render_frame_observer.cc
diff --git a/chrome/renderer/chrome_render_frame_observer.cc b/chrome/renderer/chrome_render_frame_observer.cc
index 881ff7768c3a775d170b0105fe74a3adfbecba8a..833e6ce502760775fa3433c8c6aaa01c10e19753 100644
--- a/chrome/renderer/chrome_render_frame_observer.cc
+++ b/chrome/renderer/chrome_render_frame_observer.cc
@@ -25,6 +25,7 @@
 #include "chrome/renderer/safe_browsing/phishing_classifier_delegate.h"
 #include "components/translate/content/renderer/translate_helper.h"
 #include "content/public/renderer/render_frame.h"
+#include "content/public/renderer/render_thread.h"
 #include "content/public/renderer/render_view.h"
 #include "extensions/common/constants.h"
 #include "printing/features/features.h"
@@ -249,6 +250,24 @@ void ChromeRenderFrameObserver::DidFinishLoad() {
     Send(new ChromeViewHostMsg_PageHasOSDD(
         routing_id(), frame->document().url(), osdd_url));
   }
+
+  content::RendererMemoryMetrics memory_metrics;
+  content::RenderThread::Get()->GetRendererMemoryMetrics(&memory_metrics);

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

Can we measure # of tabs in this renderer at this point?

If there're many cases that this renderer is shared by multiple tabs, we'll end
up with collecting "meaningless" values -- we need to think about another way to
make the measurement a more meaningful thing.

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

Added Memory.Experimental.Renderer.*.TotalAllocatedPerRenderViewMB which divides
the memory size with the # of RenderViews.

+  UMA_HISTOGRAM_MEMORY_KB("Renderer.Memory.DidFinishLoad.PartitionAllocKB",
+                          memory_metrics.partition_alloc_kb);
+  UMA_HISTOGRAM_MEMORY_KB("Renderer.Memory.DidFinishLoad.BlinkGCKB",
+                          memory_metrics.blink_gc_kb);
+  UMA_HISTOGRAM_MEMORY_MB("Renderer.Memory.DidFinishLoad.MallocMB",
+                          memory_metrics.malloc_mb);
+  UMA_HISTOGRAM_MEMORY_KB("Renderer.Memory.DidFinishLoad.DiscardableKB",
+                          memory_metrics.discardable_kb);
+  UMA_HISTOGRAM_MEMORY_MB("Renderer.Memory.DidFinishLoad.V8MainThreadIsolateMB",
+                          memory_metrics.v8_main_thread_isolate_mb);
+  UMA_HISTOGRAM_MEMORY_MB("Renderer.Memory.DidFinishLoad.TotalAllocatedMB",
+                          memory_metrics.total_allocated_mb);
+  UMA_HISTOGRAM_MEMORY_MB(
+      "Renderer.Memory.DidFinishLoad.NonDiscardableTotalAllocatedMB",
+      memory_metrics.non_discardable_total_allocated_mb);
 }
 
 void ChromeRenderFrameObserver::DidStartProvisionalLoad() {