Add "lsan" to GYP options (enables LeakSanitizer).

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 261 matching lines @@
       # Run tools/clang/scripts/update.sh to make sure they are compiled.
       # This causes 'clang_chrome_plugins_flags' to be set.
       # Has no effect if 'clang' is not set as well.
       'clang_use_chrome_plugins%': 1,
 
       # Enable building with ASAN (Clang's -fsanitize=address option).
       # -fsanitize=address only works with clang, but asan=1 implies clang=1
       # See https://sites.google.com/a/chromium.org/dev/developers/testing/addresssanitizer
       'asan%': 0,
 
+      # Enable building with LSan (Clang's -fsanitize=leak option).
+      # -fsanitize=leak only works with clang, but lsan=1 implies clang=1
+      # See https://sites.google.com/a/chromium.org/dev/developers/testing/leaksanitizer
+      'lsan%': 0,
+
       # Enable building with TSAN (Clang's -fsanitize=thread option).
       # -fsanitize=thread only works with clang, but tsan=1 implies clang=1
       # See http://clang.llvm.org/docs/ThreadSanitizer.html
       'tsan%': 0,
       'tsan_blacklist%': '<(PRODUCT_DIR)/../../tools/valgrind/tsan_v2/ignores.txt',
 
       # Enable building with MSAN (Clang's -fsanitize=memory option).
       # MemorySanitizer only works with clang, but msan=1 implies clang=1
       # See http://clang.llvm.org/docs/MemorySanitizer.html
       'msan%': 0,
@@ skipping 478 matching lines @@
     'enable_one_click_signin%': '<(enable_one_click_signin)',
     'enable_webrtc%': '<(enable_webrtc)',
     'chromium_win_pch%': '<(chromium_win_pch)',
     'configuration_policy%': '<(configuration_policy)',
     'safe_browsing%': '<(safe_browsing)',
     'input_speech%': '<(input_speech)',
     'notifications%': '<(notifications)',
     'clang_use_chrome_plugins%': '<(clang_use_chrome_plugins)',
     'mac_want_real_dsym%': '<(mac_want_real_dsym)',
     'asan%': '<(asan)',
+    'lsan%': '<(lsan)',
     'msan%': '<(msan)',
     'tsan%': '<(tsan)',
     'tsan_blacklist%': '<(tsan_blacklist)',
     'clang_type_profiler%': '<(clang_type_profiler)',
     'order_profiling%': '<(order_profiling)',
     'order_text_section%': '<(order_text_section)',
     'enable_extensions%': '<(enable_extensions)',
     'enable_plugin_installation%': '<(enable_plugin_installation)',
     'enable_plugins%': '<(enable_plugins)',
     'enable_session_service%': '<(enable_session_service)',
@@ skipping 293 matching lines @@
 
     # MDNS is disabled by default.
     'enable_mdns%' : 0,
 
     'conditions': [
       # The version of GCC in use, set later in platforms that use GCC and have
       # not explicitly chosen to build with clang. Currently, this means all
       # platforms except Windows, Mac and iOS.
       # TODO(glider): set clang to 1 earlier for ASan and TSan builds so that
       # it takes effect here.
-      ['os_posix==1 and OS!="mac" and OS!="ios" and clang==0 and asan==0 and tsan==0 and msan==0', {
+      ['os_posix==1 and OS!="mac" and OS!="ios" and clang==0 and asan==0 and lsan==0 and tsan==0 and msan==0', {
         'gcc_version%': '<!(python <(DEPTH)/build/compiler_version.py)',
       }, {
         'gcc_version%': 0,
       }],
       ['OS=="win" and "<!(python <(DEPTH)/build/dir_exists.py <(windows_sdk_default_path))"=="True"', {
         'windows_sdk_path%': '<(windows_sdk_default_path)',
       }, {
         'windows_sdk_path%': 'C:/Program Files (x86)/Windows Kits/8.0',
       }],
       ['OS=="win" and "<!(python <(DEPTH)/build/dir_exists.py <(directx_sdk_default_path))"=="True"', {
@@ skipping 467 matching lines @@
       }],
 
       ['asan==1 and OS!="win"', {
         'clang%': 1,
       }],
       ['asan==1 and OS=="mac"', {
         # TODO(glider): we do not strip ASan binaries until the dynamic ASan
         # runtime is fully adopted. See http://crbug.com/242503.
         'mac_strip_release': 0,
       }],
+      ['lsan==1', {
+        'clang%': 1,
+      }],
       ['tsan==1', {
         'clang%': 1,
       }],
       ['msan==1', {
         'clang%': 1,
       }],
 
       ['OS=="linux" and clang_type_profiler==1', {
         'clang%': 1,
         'clang_use_chrome_plugins%': 0,
@@ skipping 1527 matching lines @@
               # see llvm.org/PR15798 / crbug.com/233709
               '-momit-leaf-frame-pointer',
             ],
           }],
           ['clang==1 and "<(GENERATOR)"=="ninja"', {
             'cflags': [
               # See http://crbug.com/110262
               '-fcolor-diagnostics',
             ],
           }],
-          # Common options for AddressSanitizer, ThreadSanitizer and
-          # MemorySanitizer.
-          ['asan==1 or tsan==1 or msan==1', {
+          # Common options for AddressSanitizer, LeakSanitizer,
+          # ThreadSanitizer and MemorySanitizer.
+          ['asan==1 or lsan==1 or tsan==1 or msan==1', {
             'target_conditions': [
               ['_toolset=="target"', {
                 'cflags': [
                   '-fno-omit-frame-pointer',
                   '-gline-tables-only',
                 ],
                 'ldflags!': [
                   # Functions interposed by the sanitizers can make ld think
                   # that some libraries aren't needed when they actually are,
                   # http://crbug.com/234010. As workaround, disable --as-needed.
@@ skipping 24 matching lines @@
               }],
             ],
             'conditions': [
               ['OS=="mac"', {
                 'cflags': [
                   '-mllvm -asan-globals=0',  # http://crbug.com/196561
                 ],
               }],
             ],
           }],
+          ['lsan==1', {
+            'target_conditions': [
+              ['_toolset=="target"', {
+                'cflags': [
+                  '-fsanitize=leak',
+                ],
+                'ldflags': [
+                  '-fsanitize=leak',
+                ],

[Nico, 2013/06/13 15:54:48]

fyi: cflags and ldflags are linux-only (in case you're expecting this to work on
os x)

+                'defines': [
+                  'LEAK_SANITIZER',
+                ],
+              }],
+            ],
+          }],
           ['tsan==1', {
             'target_conditions': [
               ['_toolset=="target"', {
                 'cflags': [
                   '-fsanitize=thread',
                   '-fPIC',
                   '-mllvm', '-tsan-blacklist=<(tsan_blacklist)',
                 ],
                 'ldflags': [
                   '-fsanitize=thread',
@@ skipping 1337 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',
   },
 }