[SystemInfo API] Finish TODOs in SystemInfoProvider

chrome/browser/extensions/api/system_info_cpu/cpu_info_provider.cc

Index: chrome/browser/extensions/api/system_info_cpu/cpu_info_provider.cc
diff --git a/chrome/browser/extensions/api/system_info_cpu/cpu_info_provider.cc b/chrome/browser/extensions/api/system_info_cpu/cpu_info_provider.cc
index edc56fe2ff52f729d138d57ff5738797bc63963a..39b840027d804ee40656f2f568059c376c019799 100644
--- a/chrome/browser/extensions/api/system_info_cpu/cpu_info_provider.cc
+++ b/chrome/browser/extensions/api/system_info_cpu/cpu_info_provider.cc
@@ -14,9 +14,12 @@ CpuInfoProvider::CpuInfoProvider() {}
 
 CpuInfoProvider::~CpuInfoProvider() {}
 
-bool CpuInfoProvider::QueryInfo(CpuInfo* info) {
-  if (info == NULL)
-    return false;
+const CpuInfo& CpuInfoProvider::cpu_info() const {
+  return info_;
+}
+
+bool CpuInfoProvider::QueryInfo() {
+  CpuInfo* info = &info_;
 
   info->num_of_processors = base::SysInfo::NumberOfProcessors();
   info->arch_name = base::SysInfo::OperatingSystemArchitecture();