cros: Add UMA stat for graphics driver memory on tab discard

chrome/browser/ui/webui/about_ui.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/about_ui.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 345 matching lines @@
   output.append(StringPrintf("%d discards this session. ",
                              oom->discard_count()));
   output.append(StringPrintf("<a href='%s%s'>Discard tab now</a>",
                              chrome::kChromeUIDiscardsURL,
                              kRunCommand));
 
   base::SystemMemoryInfoKB meminfo;
   base::GetSystemMemoryInfo(&meminfo);
   output.append("<h3>System memory information in MB</h3>");
   output.append("<table>");
+  // Start with summary statistics.
   output.append(AddStringRow(
-    "Total", base::IntToString(meminfo.total / 1024)));
+      "Total", base::IntToString(meminfo.total / 1024)));
   output.append(AddStringRow(
-    "Free", base::IntToString(meminfo.free / 1024)));
+      "Free", base::IntToString(meminfo.free / 1024)));
+  int mem_allocated_kb = meminfo.active_anon + meminfo.inactive_anon;
+#if defined(ARCH_CPU_ARM_FAMILY)
+  // ARM counts allocated graphics memory separately from anonymous.
+  if (meminfo.gem_size != -1)
+    mem_allocated_kb += meminfo.gem_size / 1024;
+#endif
   output.append(AddStringRow(
-    "Buffered", base::IntToString(meminfo.buffers / 1024)));
+      "Allocated", base::IntToString(mem_allocated_kb / 1024)));
+  // Add some space, then detailed numbers.
+  output.append(AddStringRow("&nbsp;", "&nbsp;"));
   output.append(AddStringRow(
-    "Cached", base::IntToString(meminfo.cached / 1024)));
+      "Buffered", base::IntToString(meminfo.buffers / 1024)));
   output.append(AddStringRow(
-    "Committed", base::IntToString(
-    (meminfo.total - meminfo.free - meminfo.buffers - meminfo.cached) / 1024)));
+      "Cached", base::IntToString(meminfo.cached / 1024)));
   output.append(AddStringRow(
-    "Active Anon", base::IntToString(meminfo.active_anon / 1024)));
+      "Active Anon", base::IntToString(meminfo.active_anon / 1024)));
   output.append(AddStringRow(
-    "Inactive Anon", base::IntToString(meminfo.inactive_anon / 1024)));
+      "Inactive Anon", base::IntToString(meminfo.inactive_anon / 1024)));
   output.append(AddStringRow(
-    "Shared", base::IntToString(meminfo.shmem / 1024)));
+      "Shared", base::IntToString(meminfo.shmem / 1024)));
+  if (meminfo.gem_size != -1) {
+    output.append(AddStringRow(
+        "Graphics", base::IntToString(meminfo.gem_size / 1024 / 1024)));
+  }
   output.append("</table>");
 
   AppendFooter(&output);
   return output;
 }
 
 #endif  // OS_CHROMEOS
 
 #if defined(USE_ASH)
 
@@ skipping 636 matching lines @@
   ThemeSource* theme = new ThemeSource(profile);
   ChromeURLDataManager::AddDataSource(profile, theme);
 #endif
 
   ChromeURLDataManager::DataSource* source =
       new AboutUIHTMLSource(name, profile);
   if (source) {
     ChromeURLDataManager::AddDataSource(profile, source);
   }
 }