Refine systemInfo.cpu API defintions and provide systemInfo.cpu.get impl for Windows and Linux

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

 // 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.
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "chrome/browser/extensions/api/system_info_cpu/cpu_info_provider.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/common/chrome_switches.h"
 
 namespace extensions {
 
 using api::experimental_system_info_cpu::CpuInfo;
-using api::experimental_system_info_cpu::CpuCoreInfo;
 
 class MockCpuInfoProviderImpl : public CpuInfoProvider {
  public:
   MockCpuInfoProviderImpl() {}
   ~MockCpuInfoProviderImpl() {}
 
   virtual bool QueryInfo(CpuInfo* info) OVERRIDE {
-    DCHECK(info);
+    if (!info) return false;
 
-    info->cores.clear();
+    info->num_of_processors = 4;
+    info->arch_name = "x86";
+    info->model_name = "unknown";
 
-    static const unsigned int kNumberOfCores = 4;
-    for (unsigned int i = 0; i < kNumberOfCores; ++i) {
-      linked_ptr<CpuCoreInfo> core(new CpuCoreInfo());
-      core->load = i*10;
-      info->cores.push_back(core);
-    }
     return true;
   }
 };
 
 class SystemInfoCpuApiTest: public ExtensionApiTest {
  public:
   SystemInfoCpuApiTest() {}
   ~SystemInfoCpuApiTest() {}
 
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
@@ skipping 12 matching lines @@
 
  private:
   scoped_ptr<MessageLoop> message_loop_;
 };
 
 IN_PROC_BROWSER_TEST_F(SystemInfoCpuApiTest, Cpu) {
   ASSERT_TRUE(RunExtensionTest("systeminfo/cpu")) << message_;
 }
 
 }  // namespace extensions