Add a histogram for renderer memory usage.

webkit/glue/webkit_glue.h

 // 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.
 
 #ifndef WEBKIT_GLUE_WEBKIT_GLUE_H_
 #define WEBKIT_GLUE_WEBKIT_GLUE_H_
 
 #include "base/basictypes.h"
 
 #if defined(OS_WIN)
@@ skipping 96 matching lines @@
 std::string GetInspectorProtocolVersion();
 
 // Tells caller whether the given protocol version is supported by the.
 WEBKIT_GLUE_EXPORT bool IsInspectorProtocolVersionSupported(
     const std::string& version);
 
 // Configures the URLRequest according to the referrer policy.
 WEBKIT_GLUE_EXPORT void ConfigureURLRequestForReferrerPolicy(
     net::URLRequest* request, WebKit::WebReferrerPolicy referrer_policy);
 
+// Returns an estimate of the memory usage of the renderer process. Different
+// platforms implement this function differently, and count in different
+// allocations. Results are not comparable across platforms. The estimate is
+// computed inside the sandbox and thus its not always accurate.
+WEBKIT_GLUE_EXPORT size_t MemoryUsageKB();
+
 }  // namespace webkit_glue
 
 #endif  // WEBKIT_GLUE_WEBKIT_GLUE_H_