Revert 212927 "Move webkitplatformsupport_impl and related from ..."

trunk/src/webkit/glue/webkit_glue.cc

 // Copyright 2013 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 "webkit/glue/webkit_glue.h"
 
 #if defined(OS_LINUX)
 #include <malloc.h>
 #endif
 
@@ skipping 71 matching lines @@
 WebCanvas* ToWebCanvas(skia::PlatformCanvas* canvas) {
   return canvas;
 }
 
 int GetGlyphPageCount() {
   return WebGlyphCache::pageCount();
 }
 
 COMPILE_ASSERT(std::numeric_limits<double>::has_quiet_NaN, has_quiet_NaN);
 
+#if defined(OS_LINUX) || defined(OS_ANDROID)
+size_t MemoryUsageKB() {
+  struct mallinfo minfo = mallinfo();
+  uint64_t mem_usage =
+#if defined(USE_TCMALLOC)
+      minfo.uordblks
+#else
+      (minfo.hblkhd + minfo.arena)
+#endif
+      >> 10;
+
+  v8::HeapStatistics stat;
+  // TODO(svenpanne) The call below doesn't take web workers into account, this
+  // has to be done manually by iterating over all Isolates involved.
+  v8::Isolate::GetCurrent()->GetHeapStatistics(&stat);
+  return mem_usage + (static_cast<uint64_t>(stat.total_heap_size()) >> 10);
+}
+#elif defined(OS_MACOSX)
+size_t MemoryUsageKB() {
+  scoped_ptr<base::ProcessMetrics> process_metrics(
+      // The default port provider is sufficient to get data for the current
+      // process.
+      base::ProcessMetrics::CreateProcessMetrics(
+          base::GetCurrentProcessHandle(), NULL));
+  return process_metrics->GetWorkingSetSize() >> 10;
+}
+#else
+size_t MemoryUsageKB() {
+  scoped_ptr<base::ProcessMetrics> process_metrics(
+      base::ProcessMetrics::CreateProcessMetrics(
+          base::GetCurrentProcessHandle()));
+  return process_metrics->GetPagefileUsage() >> 10;
+}
+#endif
+
 } // namespace webkit_glue