Allocator cleanup: allocator_extension call directly into tcmalloc

After crrev.com/1584893002 base/ can use directly allocator.
The grand plan is to dismantle all the indirection layer such that:
 - base is the only thing that knows about allocator-specific details.
 - non-base code uses only base abstractions and stops looking
   at USE_TCMALLOC build flags.

This CL, specifically, addresses the profiling-related methods moving
the tcmalloc-specific dependencies to base and base only.
Other parts of the codebase will be cleaned up in separate CLs.

Also this CL removes a stale base/debug/OWNERS. That file makes
no sense these days as tracing has been moved to base/trace_event/.

BUG=564618

Review URL: https://codereview.chromium.org/1607303002

Cr-Commit-Position: refs/heads/master@{#371335}

1 files changed, 3 insertions, 7 deletions

diff --git a/content/browser/zygote_host/zygote_host_impl_linux.cc b/content/browser/zygote_host/zygote_host_impl_linux.cc
index 8b5ad76..f61d813 100644
--- a/content/browser/zygote_host/zygote_host_impl_linux.cc
+++ b/content/browser/zygote_host/zygote_host_impl_linux.cc
@@ -4,6 +4,7 @@
 
 #include "content/browser/zygote_host/zygote_host_impl_linux.h"
 
+#include "base/allocator/allocator_extension.h"
 #include "base/files/file_enumerator.h"
 #include "base/process/kill.h"
 #include "base/process/memory.h"
@@ -11,10 +12,6 @@
 #include "content/public/browser/content_browser_client.h"
 #include "sandbox/linux/suid/common/sandbox.h"
 
-#if defined(USE_TCMALLOC)
-#include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
-#endif
-
 namespace content {
 
 // static
@@ -104,13 +101,12 @@ void ZygoteHostImpl::AdjustRendererOOMScore(base::ProcessHandle pid,
   }
 
   if (use_suid_sandbox_for_adj_oom_score_ && !selinux) {
-#if defined(USE_TCMALLOC)
     // If heap profiling is running, these processes are not exiting, at least
     // on ChromeOS. The easiest thing to do is not launch them when profiling.
     // TODO(stevenjb): Investigate further and fix.
-    if (IsHeapProfilerRunning())
+    if (base::allocator::IsHeapProfilerRunning())
       return;
-#endif
+
     std::vector<std::string> adj_oom_score_cmdline;
     adj_oom_score_cmdline.push_back(sandbox_binary_);
     adj_oom_score_cmdline.push_back(sandbox::kAdjustOOMScoreSwitch);