Fix a couple of pointer DCHECKs.

These don't work when DCHECK is switched to a more CHECK-like impl,
since there is no operator<<() for the relevant pointer type.

BUG=596231

Review-Url: https://codereview.chromium.org/2013723004
Cr-Commit-Position: refs/heads/master@{#396038}


CrOS-Libchrome-Original-Commit: bd4ffd8f5f7269b818d544cc55ff059be8095d49
diff --git a/base/debug/profiler.cc b/base/debug/profiler.cc
index a4426ab..b19e7ec 100644
--- a/base/debug/profiler.cc
+++ b/base/debug/profiler.cc
@@ -154,8 +154,8 @@
   FunctionSearchContext* context =
       reinterpret_cast<FunctionSearchContext*>(cookie);
 
-  DCHECK_NE(nullptr, context);
-  DCHECK_EQ(nullptr, context->function);
+  DCHECK(context);
+  DCHECK(!context->function);
 
   // Our import address table contains pointers to the functions we import
   // at this point. Let's retrieve the first such function and use it to