diff --git a/build/common.gypi b/build/common.gypi
index 9cff345..7361a11 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -129,6 +129,9 @@
        # Disable file manager component extension by default.
       'file_manager_extension%': 0,
 
+      # Disable WebUI TaskManager by default.
+      'webui_task_manager%': 0,
+
       # Python version.
       'python_ver%': '2.6',
 
@@ -252,6 +255,13 @@
           'file_manager_extension%': 0,
         }],
         
+        # Enable WebUI TaskManager only on Chrome OS and Touch UI.
+        ['chromeos==1 or touchui==1', {
+          'webui_task_manager%': 1,
+        }, {
+          'webui_task_manager%': 0,
+        }],
+
         # Enable smooth scrolling for Linux and ChromeOS
         ['OS=="linux"', {
           'enable_smooth_scrolling%': 1,
@@ -281,6 +291,7 @@
     'touchui%': '<(touchui)',
     'webui_certificate_viewer%': '<(webui_certificate_viewer)',
     'file_manager_extension%': '<(file_manager_extension)',
+    'webui_task_manager%': '<(webui_task_manager)',
     'inside_chromium_build%': '<(inside_chromium_build)',
     'fastbuild%': '<(fastbuild)',
     'python_ver%': '<(python_ver)',
@@ -639,6 +650,9 @@
       ['file_manager_extension==1', {
         'grit_defines': ['-D', 'file_manager_extension'],
       }],
+      ['webui_task_manager==1', {
+        'grit_defines': ['-D', 'webui_task_manager'],
+      }],
       ['remoting==1', {
         'grit_defines': ['-D', 'remoting'],
       }],
@@ -747,6 +761,9 @@
       ['file_manager_extension==1', {
         'defines': ['FILE_MANAGER_EXTENSION=1'],
       }],
+      ['webui_task_manager==1', {
+        'defines': ['WEBUI_TASK_MANAGER=1'],
+      }],
       ['profiling==1', {
         'defines': ['ENABLE_PROFILING=1'],
       }],