Added page to Observatory to display native memory allocation information.

runtime/observatory/lib/src/elements/cpu_profile/virtual_tree.dart

Index: runtime/observatory/lib/src/elements/cpu_profile/virtual_tree.dart
diff --git a/runtime/observatory/lib/src/elements/cpu_profile/virtual_tree.dart b/runtime/observatory/lib/src/elements/cpu_profile/virtual_tree.dart
index 7617a20da4ada1bc6083171d19f10695b4699cf2..38fb04f7d9e195f5713ebc366ce8cc0055dd04cc 100644
--- a/runtime/observatory/lib/src/elements/cpu_profile/virtual_tree.dart
+++ b/runtime/observatory/lib/src/elements/cpu_profile/virtual_tree.dart
@@ -7,7 +7,8 @@ import 'dart:html';
 import 'dart:math' as Math;
 import 'package:observatory/models.dart' as M;
 import 'package:observatory/src/elements/stack_trace_tree_config.dart'
-    show ProfileTreeMode;
+    show ProfileTreeMode,
+         ProfileTreeType;
 import 'package:observatory/src/elements/code_ref.dart';
 import 'package:observatory/src/elements/containers/virtual_tree.dart';
 import 'package:observatory/src/elements/function_ref.dart';
@@ -16,7 +17,8 @@ import 'package:observatory/src/elements/helpers/tag.dart';
 import 'package:observatory/utils.dart';
 
 export 'package:observatory/src/elements/stack_trace_tree_config.dart'
-    show ProfileTreeMode;
+    show ProfileTreeMode,
+         ProfileTreeType;
 
 class CpuProfileVirtualTreeElement extends HtmlElement implements Renderable {
   static const tag =
@@ -29,12 +31,14 @@ class CpuProfileVirtualTreeElement extends HtmlElement implements Renderable {
 
   M.ProfileTreeDirection _direction;
   ProfileTreeMode _mode;
+  ProfileTreeType _type;
   M.IsolateRef _isolate;
   M.SampleProfile _profile;
   Iterable<M.CallTreeNodeFilter> _filters;
 
   M.ProfileTreeDirection get direction => _direction;
   ProfileTreeMode get mode => _mode;
+  ProfileTreeType get type => _type;
   M.IsolateRef get isolate => _isolate;
   M.SampleProfile get profile => _profile;
   Iterable<M.CallTreeNodeFilter> get filters => _filters;
@@ -50,9 +54,9 @@ class CpuProfileVirtualTreeElement extends HtmlElement implements Renderable {
   factory CpuProfileVirtualTreeElement(
       M.IsolateRef isolate, M.SampleProfile profile,
       {ProfileTreeMode mode: ProfileTreeMode.function,
+      ProfileTreeType type: ProfileTreeType.cpu,
       M.ProfileTreeDirection direction: M.ProfileTreeDirection.exclusive,
       RenderingQueue queue}) {
-    assert(isolate != null);
     assert(profile != null);
     assert(mode != null);
     assert(direction != null);
@@ -61,6 +65,7 @@ class CpuProfileVirtualTreeElement extends HtmlElement implements Renderable {
     e._isolate = isolate;
     e._profile = profile;
     e._mode = mode;
+    e._type = type;
     e._direction = direction;
     return e;
   }
@@ -84,15 +89,31 @@ class CpuProfileVirtualTreeElement extends HtmlElement implements Renderable {
 
   void render() {
     var tree;
+    var create;
     var update;
+
+    if (type == ProfileTreeType.cpu) {
+      create = _createCpuRow;
+    } else {
+      create = _createMemoryRow;
+    }
+
     switch (mode) {
       case ProfileTreeMode.code:
         tree = _profile.loadCodeTree(_direction);
-        update = _updateCodeRow;
+        if (type == ProfileTreeType.cpu) {
+          update = _updateCpuCodeRow;
+        } else {
+          update = _updateMemoryCodeRow;
+        }
         break;
       case ProfileTreeMode.function:
         tree = _profile.loadFunctionTree(_direction);
-        update = _updateFunctionRow;
+        if (type == ProfileTreeType.cpu) {
+          update = _updateCpuFunctionRow;
+        } else {
+          update = _updateMemoryFunctionRow;
+        }
         break;
       default:
         throw new Exception('Unknown ProfileTreeMode: $mode');
@@ -106,7 +127,7 @@ class CpuProfileVirtualTreeElement extends HtmlElement implements Renderable {
       children = [new HeadingElement.h1()..text = 'No Results'];
       return;
     }
-    _tree = new VirtualTreeElement(_createRow, update, _getChildren,
+    _tree = new VirtualTreeElement(create, update, _getChildren,
         items: tree.root.children, queue: _r.queue);
     if (tree.root.children.length == 1) {
       _tree.expand(tree.root.children.first, autoExpandSingleChildNodes: true);
@@ -114,7 +135,7 @@ class CpuProfileVirtualTreeElement extends HtmlElement implements Renderable {
     children = [_tree];
   }
 
-  static Element _createRow(toggle) {
+  static Element _createCpuRow(toggle) {
     return new DivElement()
       ..classes = ['tree-item']
       ..children = [
@@ -135,9 +156,30 @@ class CpuProfileVirtualTreeElement extends HtmlElement implements Renderable {
       ];
   }
 
+  static Element _createMemoryRow(toggle) {
+    return new DivElement()
+      ..classes = ['tree-item']
+      ..children = [
+        new SpanElement()
+          ..classes = ['inclusive']
+          ..title = 'memory allocated from resulting calls: ',
+        new SpanElement()
+          ..classes = ['exclusive']
+          ..title = 'memory allocated during execution: ',
+        new SpanElement()..classes = ['lines'],
+        new ButtonElement()
+          ..classes = ['expander']
+          ..onClick.listen((_) => toggle(autoToggleSingleChildNodes: true)),
+        new SpanElement()
+          ..classes = ['percentage']
+          ..title = 'tree node %',
+        new SpanElement()..classes = ['name']
+      ];
+  }
+
   static _getChildren(M.CallTreeNode node) => node.children;
 
-  void _updateFunctionRow(
+  void _updateCpuFunctionRow(
       HtmlElement element, M.FunctionCallTreeNode item, int depth) {
     element.children[0].text = Utils
         .formatPercentNormalized(item.profileFunction.normalizedInclusiveTicks);
@@ -155,7 +197,30 @@ class CpuProfileVirtualTreeElement extends HtmlElement implements Renderable {
       ..classes = ['name'];
   }
 
-  void _updateCodeRow(HtmlElement element, M.CodeCallTreeNode item, int depth) {
+  void _updateMemoryFunctionRow(
+      HtmlElement element, M.FunctionCallTreeNode item, int depth) {
+    element.children[0].text = Utils
+        .formatSize(item.inclusiveNativeAllocations);
+    element.children[0].title = 'memory allocated from resulting calls: ' +
+      '${item.inclusiveNativeAllocations}B';
+    element.children[1].text = Utils
+        .formatSize(item.exclusiveNativeAllocations);
+    element.children[1].title = 'memory allocated during execution: ' +
+      '${item.exclusiveNativeAllocations}B';
+    _updateLines(element.children[2].children, depth);
+    if (item.children.isNotEmpty) {
+      element.children[3].text = _tree.isExpanded(item) ? '▼' : '►';
+    } else {
+      element.children[3].text = '';
+    }
+    element.children[4].text =
+      Utils.formatPercentNormalized(item.percentage);
+    element.children[5] = new FunctionRefElement(
+        null, item.profileFunction.function, queue: _r.queue)
+      ..classes = ['name'];
+  }
+
+  void _updateCpuCodeRow(HtmlElement element, M.CodeCallTreeNode item, int depth) {
     element.children[0].text = Utils
         .formatPercentNormalized(item.profileCode.normalizedInclusiveTicks);
     element.children[1].text = Utils
@@ -171,6 +236,27 @@ class CpuProfileVirtualTreeElement extends HtmlElement implements Renderable {
         queue: _r.queue)..classes = ['name'];
   }
 
+  void _updateMemoryCodeRow(HtmlElement element, M.CodeCallTreeNode item, int depth) {
+    element.children[0].text = Utils
+        .formatSize(item.inclusiveNativeAllocations);
+    element.children[0].title = 'memory allocated from resulting calls: ' +
+      '${item.inclusiveNativeAllocations}B';
+    element.children[1].text = Utils
+        .formatSize(item.exclusiveNativeAllocations);
+    element.children[1].title = 'memory allocated during execution: ' +
+      '${item.exclusiveNativeAllocations}B';
+    _updateLines(element.children[2].children, depth);
+    if (item.children.isNotEmpty) {
+      element.children[3].text = _tree.isExpanded(item) ? '▼' : '►';
+    } else {
+      element.children[3].text = '';
+    }
+    element.children[4].text =
+      Utils.formatPercentNormalized(item.percentage);
+    element.children[5] = new CodeRefElement(null, item.profileCode.code,
+        queue: _r.queue)..classes = ['name'];
+  }
+
   static _updateLines(List<Element> lines, int n) {
     n = Math.max(0, n);
     while (lines.length > n) {