linux: delete code that worked around gtk <2.18

chrome/browser/browser_main.cc

 // Copyright (c) 2011 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/browser_main.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 536 matching lines @@
       strstr(message, "wrong ELF class: ELFCLASS64")) {
     // http://crbug.com/9643
     // Until we have a real 64-bit build or all of these 32-bit package issues
     // are sorted out, don't fatal on ELF 32/64-bit mismatch warnings and don't
     // spam the user with more than one of them.
     static bool alerted = false;
     if (!alerted) {
       LOG(ERROR) << "Bug 9643: " << log_domain << ": " << message;
       alerted = true;
     }
-  } else if (strstr(message, "gtk_widget_size_allocate(): attempt to "
-                             "allocate widget with width") &&
-             !GTK_CHECK_VERSION(2, 16, 1)) {
-    // This warning only occurs in obsolete versions of GTK and is harmless.
-    // http://crbug.com/11133
   } else if (strstr(message, "Theme file for default has no") ||
              strstr(message, "Theme directory") ||
              strstr(message, "theme pixmap")) {
     LOG(ERROR) << "GTK theme error: " << message;
   } else if (strstr(message, "gtk_drag_dest_leave: assertion")) {
     LOG(ERROR) << "Drag destination deleted: http://crbug.com/18557";
   } else if (strstr(message, "Out of memory") &&
              strstr(log_domain, "<unknown>")) {
     LOG(ERROR) << "DBus call timeout or out of memory: "
                << "http://crosbug.com/15496";
@@ skipping 1612 matching lines @@
   if (env->GetVar(chrome::kPreReadEnvironmentVariable, &pre_read) &&
       (pre_read == "0" || pre_read == "1")) {
     std::string uma_name(name);
     uma_name += "_PreRead";
     uma_name += pre_read == "1" ? "Enabled" : "Disabled";
     AddPreReadHistogramTime(uma_name.c_str(), time);
   }
 #endif
 }