A Speculative Revert for 164939 - Use tcmalloc's debugallocation for Debug builds

base/allocator/allocator.gyp

Index: base/allocator/allocator.gyp
===================================================================
--- base/allocator/allocator.gyp	(revision 165095)
+++ base/allocator/allocator.gyp	(working copy)
@@ -203,7 +203,6 @@
 
         'allocator_shim.cc',
         'allocator_shim.h',
-        'debugallocation_shim.cc',
         'generic_allocators.cc',
         'win_allocator.cc',
       ],
@@ -213,10 +212,6 @@
         'generic_allocators.cc',
         'win_allocator.cc',
 
-        # Included by debugallocation_shim.cc.
-        '<(tcmalloc_dir)/src/debugallocation.cc',
-        '<(tcmalloc_dir)/src/tcmalloc.cc',
-
         # We simply don't use these, but list them above so that IDE
         # users can view the full available source for reference, etc.
         '<(tcmalloc_dir)/src/addressmap-inl.h',
@@ -305,21 +300,6 @@
               'RuntimeLibrary': '0',
             },
           },
-          'variables': {
-            # Provide a way to force disable debugallocation in Debug builds,
-            # e.g. for profiling (it's more rare to profile Debug builds,
-            # but people sometimes need to do that).
-            'disable_debugallocation%': 0,
-          },
-          'conditions': [
-            ['disable_debugallocation==0', {
-              'defines': [
-                # Use debugallocation for Debug builds to catch problems early
-                # and cleanly, http://crbug.com/30715 .
-                'TCMALLOC_FOR_DEBUGALLOCATION',
-              ],
-            }],
-          ],
         },
       },
       'conditions': [
@@ -366,7 +346,7 @@
             '<(tcmalloc_dir)/src/system-alloc.h',
 
             # included by allocator_shim.cc
-            'debugallocation_shim.cc',
+            '<(tcmalloc_dir)/src/tcmalloc.cc',
 
             # heap-profiler/checker/cpuprofiler
             '<(tcmalloc_dir)/src/base/thread_lister.c',
@@ -385,6 +365,9 @@
             '<(tcmalloc_dir)/src/profile-handler.cc',
             '<(tcmalloc_dir)/src/profile-handler.h',
             '<(tcmalloc_dir)/src/profiler.cc',
+
+            # debugallocation
+            '<(tcmalloc_dir)/src/debugallocation.cc',
           ],
         }],
         ['OS=="linux" or OS=="freebsd" or OS=="solaris"', {
@@ -431,6 +414,20 @@
             '-fvtable-verify=preinit',
           ],
         }],
+        [ 'linux_use_debugallocation==1', {
+          'sources!': [
+            # debugallocation.cc #includes tcmalloc.cc,
+            # so only one of them should be used.
+            '<(tcmalloc_dir)/src/tcmalloc.cc',
+          ],
+          'defines': [
+            'TCMALLOC_FOR_DEBUGALLOCATION',
+          ],
+        }, { # linux_use_debugallocation != 1
+          'sources!': [
+            '<(tcmalloc_dir)/src/debugallocation.cc',
+          ],
+        }],
         [ 'linux_keep_shadow_stacks==1', {
           'sources': [
             '<(tcmalloc_dir)/src/linux_shadow_stacks.cc',