Expose a method to access amount of memory used by the current process.

webkit/glue/webkitclient_impl.cc

Index: webkit/glue/webkitclient_impl.cc
===================================================================
--- webkit/glue/webkitclient_impl.cc	(revision 30574)
+++ webkit/glue/webkitclient_impl.cc	(working copy)
@@ -15,6 +15,7 @@
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/message_loop.h"
+#include "base/process_util.h"
 #include "base/platform_file.h"
 #include "base/stats_counters.h"
 #include "base/string_util.h"
@@ -363,6 +364,14 @@
   return WebKit::WebString();
 }
 
+int WebKitClientImpl::memoryUsageMB() {
+  using base::ProcessMetrics;
+  static ProcessMetrics* process_metrics =
+      ProcessMetrics::CreateProcessMetrics(base::GetCurrentProcessHandle());
+  DCHECK(process_metrics);
+  return process_metrics->GetPagefileUsage() >> 20;
+}
+
 bool WebKitClientImpl::fileExists(const WebKit::WebString& path) {
   FilePath::StringType file_path = webkit_glue::WebStringToFilePathString(path);
   return file_util::PathExists(FilePath(file_path));