Add renderer memory metrics

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index c424e70f7b106477e6c5b59c00aa17763921813e..e5b51aab681fd8250f7f56a5f0381923a9777dca 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -3948,6 +3948,37 @@ void RenderFrameImpl::didFinishLoad(blink::WebLocalFrame* frame) {
 
   WebDataSource* ds = frame->dataSource();
   Send(new FrameHostMsg_DidFinishLoad(routing_id_, ds->getRequest().url()));
+
+  {
+    RenderThreadImpl::RendererMemoryMetrics memory_metrics;
+    RenderThreadImpl::current()->GetRendererMemoryMetrics(&memory_metrics);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.DidFinishLoad.PartitionAllocMB",
+        memory_metrics.partition_alloc_kb / 1024);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.DidFinishLoad.BlinkGCMB",
+        memory_metrics.blink_gc_kb / 1024);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.DidFinishLoad.MallocMB",
+        memory_metrics.malloc_mb);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.DidFinishLoad.DiscardableMB",
+        memory_metrics.discardable_kb / 1024);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.DidFinishLoad.V8MainThreadIsolateMB",
+        memory_metrics.v8_main_thread_isolate_mb);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.DidFinishLoad.TotalAllocatedMB",
+        memory_metrics.total_allocated_mb);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.DidFinishLoad."
+        "NonDiscardableTotalAllocatedMB",
+        memory_metrics.non_discardable_total_allocated_mb);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.DidFinishLoad."
+        "TotalAllocatedPerRenderViewMB",
+        memory_metrics.total_allocated_per_render_view_mb);
+  }
 }
 
 void RenderFrameImpl::didNavigateWithinPage(