Don't build the task manager into Android builds.

build/common.gypi

 # 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 216 matching lines @@
 
       # PPAPI by default does not support plugins making calls off the main
       # thread. Set to 1 to turn on experimental support for out-of-process
       # plugins to make call of the main thread.
       'enable_pepper_threading%': 0,
 
       # Enables theme support, which is enabled by default.  Support for
       # disabling depends on the platform.
       'enable_themes%': 1,
 
+      # Enable the task manager by default.
+      'enable_task_manager%': 1,
+
       # XInput2 multitouch support is disabled by default (use_xi2_mt=0).
       # Setting to non-zero value enables XI2 MT. When XI2 MT is enabled,
       # the input value also defines the required XI2 minor minimum version.
       # For example, use_xi2_mt=2 means XI2.2 or above version is required.
       'use_xi2_mt%': 0,
 
       # Use of precompiled headers on Windows.
       #
       # This is on by default in VS 2010, but off by default for VS
       # 2008 because of complications that it can cause with our
@@ skipping 240 matching lines @@
     'enable_web_intents%': '<(enable_web_intents)',
     'enable_web_intents_tag%': '<(enable_web_intents_tag)',
     'enable_plugin_installation%': '<(enable_plugin_installation)',
     'enable_themes%': '<(enable_themes)',
     'linux_use_gold_binary%': '<(linux_use_gold_binary)',
     'linux_use_gold_flags%': '<(linux_use_gold_flags)',
     'use_canvas_skia%': '<(use_canvas_skia)',
     'tests_run%': '<(tests_run)',
     'enable_automation%': '<(enable_automation)',
     'force_rlz_use_chrome_net%': '<(force_rlz_use_chrome_net)',
+    'enable_task_manager%': '<(enable_task_manager)',
 
     # Whether to build for Wayland display server
     'use_wayland%': 0,
 
     # Use system yasm instead of bundled one.
     'use_system_yasm%': 0,
 
     # Default to enabled PIE; this is important for ASLR but we may need to be
     # able to turn it off for various reasons.
     'linux_disable_pie%': 0,
@@ skipping 260 matching lines @@
         'android_ndk_include': '<(android_ndk_sysroot)/usr/include',
         'android_ndk_lib': '<(android_ndk_sysroot)/usr/lib',
 
         # Uses Android's crash report system
         'linux_breakpad%': 0,
 
         # Always uses openssl.
         'use_openssl%': 1,
 
         'proprietary_codecs%': '<(proprietary_codecs)',
+        'enable_task_manager%': 0,
         'safe_browsing%': 0,
         'configuration_policy%': 0,
         'input_speech%': 0,
         'enable_web_intents%': 0,
         'java_bridge%': 1,
         # Android does not support themes.
         'enable_themes%': 0,
 
         # Set to 1 once we have a notification system for Android.
         # http://crbug.com/115320
@@ skipping 551 matching lines @@
         ],
         'include_dirs': [
           '<(DEPTH)/third_party/wtl/include',
         ],
       }],  # OS==win
       ['enable_register_protocol_handler==1', {
         'defines': [
           'ENABLE_REGISTER_PROTOCOL_HANDLER=1',
         ],
       }],
+      ['enable_task_manager==1', {
+        'defines': [
+          'ENABLE_TASK_MANAGER=1',
+        ],
+      }],
       ['enable_web_intents==1', {
         'defines': [
           'ENABLE_WEB_INTENTS=1',
         ],
       }],
       ['OS=="win" and branding=="Chrome"', {
         'defines': ['ENABLE_SWIFTSHADER'],
       }],
       ['enable_dart==1', {
         'defines': ['WEBKIT_USING_DART=1'],
@@ skipping 1586 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }