Oilpan: Add a compile-time flag: DETAILED_MEMORY_INFRA

Source/build/features.gypi

Index: Source/build/features.gypi
diff --git a/Source/build/features.gypi b/Source/build/features.gypi
index 92ab0ca6c77656bcc8a25a89e68d403be7b865f3..734a5db10902688f7e47ba5ee7245add0a895c6a 100644
--- a/Source/build/features.gypi
+++ b/Source/build/features.gypi
@@ -49,7 +49,10 @@
     'variables': {
       # Enables the Oilpan garbage-collection infrastructure.
       'enable_oilpan%': 0,
+      # TODO(haraken): Remove blink_gc_profiling. It's replaced with
+      # detailed_memory_infra.
       'blink_gc_profiling%': 0,

[bashi, 2015/09/08 03:52:27]

why can't we remove this now?

+      'detailed_memory_infra%': 0,
       'blink_logging_always_on%': 0,
       'link_core_modules_separately%': 1,
     },
@@ -101,6 +104,11 @@
           'ENABLE_GC_PROFILING=1',
         ],
       }],
+      ['detailed_memory_infra==1', {
+        'feature_defines': [
+          'ENABLE_DETAILED_MEMORY_INFRA=1',
+        ],
+      }],
       ['blink_logging_always_on==1', {
         'feature_defines': [
           'LOG_DISABLED=0',