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 be46fd8b8128c5eb43ff8e6d8c75d1861c037bce..88adc3b98f75ef3f5d1563fd61fca9c058fb8d6b 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -3953,6 +3953,68 @@ 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.PartitionAllocMB_DidFinishLoad",
+        memory_metrics.partition_alloc_kb / 1024);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.BlinkGCMB_DidFinishLoad",
+        memory_metrics.blink_gc_kb / 1024);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.MallocMB_DidFinishLoad",
+        memory_metrics.malloc_mb);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.DiscardableMB_DidFinishLoad",
+        memory_metrics.discardable_kb / 1024);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.V8MainThreadIsolateMB_DidFinishLoad",
+        memory_metrics.v8_main_thread_isolate_mb);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.TotalAllocatedMB_DidFinishLoad",
+        memory_metrics.total_allocated_mb);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.NonDiscardableTotalAllocatedMB_"
+        "DidFinishLoad",
+        memory_metrics.non_discardable_total_allocated_mb);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.TotalAllocatedPerRenderViewMB_"
+        "DidFinishLoad",
+        memory_metrics.total_allocated_per_render_view_mb);
+    if (IsMainFrame()) {
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.PartitionAllocMB_"
+          "MainFrameDidFinishLoad",
+          memory_metrics.partition_alloc_kb / 1024);
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.BlinkGCMB_MainFrameDidFinishLoad",
+          memory_metrics.blink_gc_kb / 1024);
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.MallocMB_MainFrameDidFinishLoad",
+          memory_metrics.malloc_mb);
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.DiscardableMB_MainFrameDidFinishLoad",
+          memory_metrics.discardable_kb / 1024);
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.V8MainThreadIsolateMB_"
+          "MainFrameDidFinishLoad",
+          memory_metrics.v8_main_thread_isolate_mb);
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.TotalAllocatedMB_"
+          "MainFrameDidFinishLoad",
+          memory_metrics.total_allocated_mb);
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.NonDiscardableTotalAllocatedMB_"
+          "MainFrameDidFinishLoad",
+          memory_metrics.non_discardable_total_allocated_mb);
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.TotalAllocatedPerRenderViewMB_"
+          "MainFrameDidFinishLoad",
+          memory_metrics.total_allocated_per_render_view_mb);
+    }
+  }
 }
 
 void RenderFrameImpl::didNavigateWithinPage(