reland crrev.com/212927 Move webkitplatformsupport_impl and related from glue to child

webkit/glue/webkit_glue.cc

Index: webkit/glue/webkit_glue.cc
diff --git a/webkit/glue/webkit_glue.cc b/webkit/glue/webkit_glue.cc
index 2ef0e5755b8f7736692ec82c60e64bbc3f30d11f..4c832f35ff81639f297b41573ef4ac833dfd335d 100644
--- a/webkit/glue/webkit_glue.cc
+++ b/webkit/glue/webkit_glue.cc
@@ -89,39 +89,4 @@ int GetGlyphPageCount() {
 
 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