Enable chrome://discards on Linux.

chrome/browser/ui/webui/about_ui.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 "chrome/browser/ui/webui/about_ui.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 406 matching lines @@
       "<p>The following pages are for debugging purposes only. Because they "
       "crash or hang the renderer, they're not linked directly; you can type "
       "them into the address bar if you need them.</p>\n<ul>";
   for (int i = 0; i < chrome::kNumberOfChromeDebugURLs; i++)
     html += "<li>" + std::string(chrome::kChromeDebugURLs[i]) + "</li>\n";
   html += "</ul>\n";
   AppendFooter(&html);
   return html;
 }
 
-#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_CHROMEOS)
+#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX)
 
 const char kAboutDiscardsRunCommand[] = "run";
 
 // Html output helper functions
 
 // Helper function to wrap HTML with a tag.
 std::string WrapWithTag(const std::string& tag, const std::string& text) {
   return "<" + tag + ">" + text + "</" + tag + ">";
 }
 
@@ skipping 137 matching lines @@
   output.append(AddStringRow(
       "Shared", base::IntToString(meminfo.shmem / 1024)));
   output.append(AddStringRow(
       "Graphics", base::IntToString(meminfo.gem_size / 1024 / 1024)));
 #endif  // OS_CHROMEOS
   output.append("</table>");
   AppendFooter(&output);
   return output;
 }
 
-#endif  // OS_WIN || OS_CHROMEOS
+#endif  // OS_WIN || OS_MACOSX || OS_LINUX
 
 // AboutDnsHandler bounces the request back to the IO thread to collect
 // the DNS information.
 class AboutDnsHandler : public base::RefCountedThreadSafe<AboutDnsHandler> {
  public:
   static void Start(Profile* profile,
                     const content::URLDataSource::GotDataCallback& callback) {
     scoped_refptr<AboutDnsHandler> handler(
         new AboutDnsHandler(profile, callback));
     handler->StartOnUIThread();
@@ skipping 177 matching lines @@
       // Resizing the response and using it as the buffer Brotli decompresses
       // into.
       response.resize(decoded_size);
       CHECK(BrotliDecompressBuffer(raw_response.size(), encoded_response_buffer,
                                    &decoded_size,
                                    reinterpret_cast<uint8_t*>(&response[0])) ==
             BROTLI_RESULT_SUCCESS);
     } else {
       response = raw_response.as_string();
     }
-#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_CHROMEOS)
+#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX)
   } else if (source_name_ == chrome::kChromeUIDiscardsHost) {
     response = AboutDiscards(path);
 #endif
   } else if (source_name_ == chrome::kChromeUIDNSHost) {
     AboutDnsHandler::Start(profile(), callback);
     return;
 #if defined(OS_LINUX) || defined(OS_OPENBSD)
   } else if (source_name_ == chrome::kChromeUILinuxProxyConfigHost) {
     response = AboutLinuxProxyConfig();
 #endif
@@ skipping 62 matching lines @@
   Profile* profile = Profile::FromWebUI(web_ui);
 
 #if defined(ENABLE_THEMES)
   // Set up the chrome://theme/ source.
   ThemeSource* theme = new ThemeSource(profile);
   content::URLDataSource::Add(profile, theme);
 #endif
 
   content::URLDataSource::Add(profile, new AboutUIHTMLSource(name, profile));
 }