metrics: Add leak detector controller in Chrome OS metrics system

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 40bb44ed5ce810f947856024d47bacd62b68d2d6..3fecc15b780f94db4c6833db1f1f5b6c8ee86e4a 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -1588,6 +1588,9 @@
     'libjpeg_ijg_gyp_path': '<(DEPTH)/third_party/libjpeg/libjpeg.gyp',
     'libjpeg_turbo_gyp_path': '<(DEPTH)/third_party/libjpeg_turbo/libjpeg.gyp',
 
+    # Enable runtime memory leak detector.
+    'enable_leak_detector%': 0,
+
     'conditions': [
       ['buildtype=="Official"', {
         # Continue to embed build meta data in Official builds, basically the
@@ -3082,6 +3085,9 @@
           'SAFE_BROWSING_DB_REMOTE',
         ],
       }],
+      ['enable_leak_detector==1 and chromeos==1', {
+        'defines': ['ENABLE_LEAK_DETECTOR=1'],
+      }],
     ],  # conditions for 'target_defaults'
     'target_conditions': [
       ['<(use_libpci)==1', {
@@ -3855,6 +3861,11 @@
                 'cflags': ['-fno-unwind-tables', '-fno-asynchronous-unwind-tables'],
                 'defines': ['NO_UNWIND_TABLES'],
               }],
+              ['enable_leak_detector==1 and chromeos==1', {
+                'cflags': [
+                  '-fno-omit-frame-pointer',
+                ],
+              }],
             ],
           },
         },