Add about:memory support for Linux....

chrome/browser/memory_details.h

 // Copyright (c) 2006-2008 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_BROWSER_MEMORY_DETAILS_H_
 #define CHROME_BROWSER_MEMORY_DETAILS_H_
 
 #include <vector>
 
 #include "base/process_util.h"
 #include "base/ref_counted.h"
 #include "chrome/common/child_process_info.h"
 
 class MessageLoop;
 
 // We collect data about each browser process.  A browser may
 // have multiple processes (of course!).  Even IE has multiple
 // processes these days.
 struct ProcessMemoryInformation {
-  ProcessMemoryInformation() {
-    memset(this, 0, sizeof(ProcessMemoryInformation));
+  ProcessMemoryInformation() : pid(0),
+                               num_processes(0),
+                               is_diagnostics(false) {
   }
 
   // The process id.
   int pid;
   // The working set information.
   base::WorkingSetKBytes working_set;
   // The committed bytes.
   base::CommittedKBytes committed;
   // The process version
   std::wstring version;
@@ skipping 32 matching lines @@
 //      }
 //
 //      // Your class stuff here
 //
 //      virtual void OnDetailsAvailable() {
 //           // do work with memory info here
 //      }
 //    }
 class MemoryDetails : public base::RefCountedThreadSafe<MemoryDetails> {
  public:
-  // Known browsers which we collect details for.
-  enum {
-    CHROME_BROWSER = 0,
-    IE_BROWSER,
-    FIREFOX_BROWSER,
-    OPERA_BROWSER,
-    SAFARI_BROWSER,
-    IE_64BIT_BROWSER,
-    KONQUEROR_BROWSER,
-    MAX_BROWSERS
-  } BrowserProcess;
-
   // Constructor.
   MemoryDetails();
   virtual ~MemoryDetails() {}
 
   // Access to the process detail information.  This is an array
   // of MAX_BROWSER ProcessData structures.  This data is only available
   // after OnDetailsAvailable() has been called.
-  ProcessData* processes() { return process_data_; }
+  const std::vector<ProcessData>& processes() { return process_data_; }
 
   // Initiate updating the current memory details.  These are fetched
   // asynchronously because data must be collected from multiple threads.
   // OnDetailsAvailable will be called when this process is complete.
   void StartFetch();
 
   virtual void OnDetailsAvailable() {}
 
  private:
   // Collect child process information on the IO thread.  This is needed because
@@ skipping 12 matching lines @@
   void CollectProcessData(std::vector<ProcessMemoryInformation>);
 
   // Collect child process information on the UI thread.  Information about
   // renderer processes is only available there.
   void CollectChildInfoOnUIThread();
 
   // Each time we take a memory sample, we do a little work to update
   // the global histograms for tracking memory usage.
   void UpdateHistograms();
 
-  ProcessData process_data_[MAX_BROWSERS];
+  // Returns a pointer to the ProcessData structure for Chrome.
+  ProcessData* ChromeBrowser();
+
+  std::vector<ProcessData> process_data_;
   MessageLoop* ui_loop_;
 
   DISALLOW_EVIL_CONSTRUCTORS(MemoryDetails);
 };
 
 #endif  // CHROME_BROWSER_MEMORY_DETAILS_H_