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 120d55863df289c3d50cb2dcb642b2302a31b5b3..7c28b2e29cb8db87a47db039351ab8ef79241514 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -3955,6 +3955,68 @@ 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.PartitionAlloc_DidFinishLoad",
+        memory_metrics.partition_alloc_kb / 1024);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.BlinkGC_DidFinishLoad",
+        memory_metrics.blink_gc_kb / 1024);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.Malloc_DidFinishLoad",
+        memory_metrics.malloc_mb);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.Discardable_DidFinishLoad",
+        memory_metrics.discardable_kb / 1024);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.V8MainThreadIsolate_DidFinishLoad",
+        memory_metrics.v8_main_thread_isolate_mb);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.TotalAllocated_DidFinishLoad",
+        memory_metrics.total_allocated_mb);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.NonDiscardableTotalAllocated_"
+        "DidFinishLoad",
+        memory_metrics.non_discardable_total_allocated_mb);
+    UMA_HISTOGRAM_MEMORY_MB(
+        "Memory.Experimental.Renderer.TotalAllocatedPerRenderView_"
+        "DidFinishLoad",
+        memory_metrics.total_allocated_per_render_view_mb);
+    if (IsMainFrame()) {
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.PartitionAlloc_"
+          "MainFrameDidFinishLoad",
+          memory_metrics.partition_alloc_kb / 1024);
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.BlinkGC_MainFrameDidFinishLoad",
+          memory_metrics.blink_gc_kb / 1024);
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.Malloc_MainFrameDidFinishLoad",
+          memory_metrics.malloc_mb);
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.Discardable_MainFrameDidFinishLoad",
+          memory_metrics.discardable_kb / 1024);
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.V8MainThreadIsolate_"
+          "MainFrameDidFinishLoad",
+          memory_metrics.v8_main_thread_isolate_mb);
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.TotalAllocated_"
+          "MainFrameDidFinishLoad",
+          memory_metrics.total_allocated_mb);
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.NonDiscardableTotalAllocated_"
+          "MainFrameDidFinishLoad",
+          memory_metrics.non_discardable_total_allocated_mb);
+      UMA_HISTOGRAM_MEMORY_MB(
+          "Memory.Experimental.Renderer.TotalAllocatedPerRenderView_"
+          "MainFrameDidFinishLoad",
+          memory_metrics.total_allocated_per_render_view_mb);
+    }
+  }
 }
 
 void RenderFrameImpl::didNavigateWithinPage(