fix about:memory and memory histograms to show extensions more clearly

chrome/common/child_process_info.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_COMMON_CHILD_PROCESS_INFO_H_
 #define CHROME_COMMON_CHILD_PROCESS_INFO_H_
 #pragma once
 
 #include <string>
 
@@ skipping 14 matching lines @@
     NACL_LOADER_PROCESS,
     UTILITY_PROCESS,
     PROFILE_IMPORT_PROCESS,
     ZYGOTE_PROCESS,
     SANDBOX_HELPER_PROCESS,
     NACL_BROKER_PROCESS,
     GPU_PROCESS,
     PPAPI_PLUGIN_PROCESS
   };
 
+  // NOTE: Do not remove or reorder the elements in this enum, and only add new
+  // items at the end. We depend on these specific values in a histogram.
+  enum RendererProcessType {
+    RENDERER_UNKNOWN = 0,
+    RENDERER_NORMAL,
+    RENDERER_CHROME,        // DOMUI (chrome:// URL)
+    RENDERER_EXTENSION,     // chrome-extension:// 
+    RENDERER_DEVTOOLS,      // Web inspector
+    RENDERER_INTERSTITIAL,  // malware/phishing interstitial
+    RENDERER_NOTIFICATION,  // HTML notification bubble
+    RENDERER_BACKGROUND_APP // hosted app background page
+  };
+
   ChildProcessInfo(const ChildProcessInfo& original);
   virtual ~ChildProcessInfo();
 
   ChildProcessInfo& operator=(const ChildProcessInfo& original);
 
   // Returns the type of the process.
   ProcessType type() const { return type_; }
 
+  // Returns the renderer subtype of this process.
+  // Only valid if the type() is RENDER_PROCESS.
+  RendererProcessType renderer_type() const { return renderer_type_; }
+
   // Returns the name of the process.  i.e. for plugins it might be Flash, while
   // for workers it might be the domain that it's from.
   std::wstring name() const { return name_; }
 
   // Returns the version of the exe, this only appliest to plugins. Otherwise
   // the string is empty.
   std::wstring version() const { return version_; }
 
   // Getter to the process handle.
   base::ProcessHandle handle() const { return process_.handle(); }
 
   // The unique identifier for this child process. This identifier is NOT a
   // process ID, and will be unique for all types of child process for
   // one run of the browser.
   int id() const { return id_; }
 
   void SetProcessBackgrounded() const { process_.SetProcessBackgrounded(true); }
 
   // Returns an English name of the process type, should only be used for non
   // user-visible strings, or debugging pages like about:memory.
+  static std::string GetFullTypeNameInEnglish(ProcessType type,
+                                              RendererProcessType rtype);
   static std::string GetTypeNameInEnglish(ProcessType type);
+  static std::string GetRendererTypeNameInEnglish(RendererProcessType type);
 
   // Returns a localized title for the child process.  For example, a plugin
   // process would be "Plug-in: Flash" when name is "Flash".
   string16 GetLocalizedTitle() const;
 
   // We define the < operator so that the ChildProcessInfo can be used as a key
   // in a std::map.
   bool operator <(const ChildProcessInfo& rhs) const {
     if (process_.handle() != rhs.process_.handle())
       return process_ .handle() < rhs.process_.handle();
@@ skipping 18 matching lines @@
   static int GenerateChildProcessUniqueId();
 
  protected:
   // Derived objects need to use this constructor so we know what type we are.
   // If the caller has already generated a unique ID for this child process,
   // it should pass it as the second argument. Otherwise, -1 should be passed
   // and a unique ID will be automatically generated.
   ChildProcessInfo(ProcessType type, int id);
 
   void set_type(ProcessType type) { type_ = type; }
+  void set_renderer_type(RendererProcessType type) { renderer_type_ = type; }
   void set_name(const std::wstring& name) { name_ = name; }
   void set_version(const std::wstring& ver) { version_ = ver; }
   void set_handle(base::ProcessHandle handle) { process_.set_handle(handle); }
 
  private:
   ProcessType type_;
+  RendererProcessType renderer_type_;
   std::wstring name_;
   std::wstring version_;
   int id_;
 
   // The handle to the process.
   mutable base::Process process_;
 };
 
 #endif  // CHROME_COMMON_CHILD_PROCESS_INFO_H_