Re-land chromeos: Add non-extension renderers to the freezer cgroup

chrome/browser/chromeos/power/freezer_cgroup_process_manager.h

Index: chrome/browser/chromeos/power/freezer_cgroup_process_manager.h
diff --git a/chrome/browser/chromeos/power/freezer_cgroup_process_manager.h b/chrome/browser/chromeos/power/freezer_cgroup_process_manager.h
index 2cf095c8358d020fd8dae13d5f4b9dfa63d83459..3a0b9ae324239e1049ce1fc3c09af5cb700defa4 100644
--- a/chrome/browser/chromeos/power/freezer_cgroup_process_manager.h
+++ b/chrome/browser/chromeos/power/freezer_cgroup_process_manager.h
@@ -5,8 +5,11 @@
 #ifndef CHROME_BROWSER_CHROMEOS_POWER_FREEZER_CGROUP_PROCESS_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_POWER_FREEZER_CGROUP_PROCESS_MANAGER_H_
 
+#include <string>
+
 #include "base/files/file_path.h"
 #include "base/macros.h"
+#include "base/process/process_handle.h"
 #include "chrome/browser/chromeos/power/renderer_freezer.h"
 
 namespace chromeos {
@@ -15,17 +18,26 @@ namespace chromeos {
 class FreezerCgroupProcessManager : public RendererFreezer::Delegate {
  public:
   FreezerCgroupProcessManager();
-  virtual ~FreezerCgroupProcessManager();
+  ~FreezerCgroupProcessManager() override;
 
   // RendererFreezer::Delegate overrides.
-  virtual bool FreezeRenderers() override;
-  virtual bool ThawRenderers() override;
-  virtual bool CanFreezeRenderers() override;
+  void SetShouldFreezeRenderer(base::ProcessHandle handle,
+                               bool frozen) override;
+  bool FreezeRenderers() override;
+  bool ThawRenderers() override;
+  bool CanFreezeRenderers() override;
 
  private:
-  bool WriteCommandToStateFile(const std::string& command);
+  bool WriteCommandToFile(const std::string& command,
+                          const base::FilePath& file);
+
+  // Control path for the cgroup that is not frozen.
+  base::FilePath default_control_path_;
+
+  // Control and state paths for the cgroup whose processes will be frozen.
+  base::FilePath to_be_frozen_control_path_;
+  base::FilePath to_be_frozen_state_path_;
 
-  base::FilePath state_path_;
   bool enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(FreezerCgroupProcessManager);