Provide access to process private and shared memory size from WebKit code

webkit/glue/webkitplatformsupport_impl.cc

Index: webkit/glue/webkitplatformsupport_impl.cc
diff --git a/webkit/glue/webkitplatformsupport_impl.cc b/webkit/glue/webkitplatformsupport_impl.cc
index 16358ffdda817ec39882af2e2227e05634079397..6b4a8590a7f39663b6ac90e79d5e1e06fb55405c 100644
--- a/webkit/glue/webkitplatformsupport_impl.cc
+++ b/webkit/glue/webkitplatformsupport_impl.cc
@@ -681,6 +681,23 @@ size_t WebKitPlatformSupportImpl::actualMemoryUsageMB() {
   return getMemoryUsageMB(true);
 }
 
+bool WebKitPlatformSupportImpl::getProcessMemorySize(size_t* private_bytes,
+                                                     size_t* shared_bytes) {
+  using base::ProcessMetrics;
+#if defined(OS_MACOSX)
+  static ProcessMetrics* process_metrics =

[tony, 2012/05/29 18:11:18]

CR_DEFINE_STATIC_LOCAL.

It would be nice if we could share the ProcessMetrics instance with
getMemoryUsageMB.

[yurys, 2012/05/30 08:06:27]

CR_DEFINE_STATIC_LOCAL cannot be used here as it calls new on the first argument
while we call a factory method here.
Done.

+      // The default port provider is sufficient to get data for the current
+      // process.
+      ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle(),
+                                           NULL);
+#else
+  static ProcessMetrics* process_metrics =

[tony, 2012/05/29 18:11:18]

CR_DEFINE_STATIC_LOCAL

[yurys, 2012/05/30 08:06:27]

See my previous comment.

+      ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle());
+#endif
+  DCHECK(process_metrics);
+  return process_metrics->GetMemoryBytes(private_bytes, shared_bytes);
+}
+
 void WebKitPlatformSupportImpl::SuspendSharedTimer() {
   ++shared_timer_suspended_;
 }