Fix a couple of pointer DCHECKs

base/debug/profiler.cc

Index: base/debug/profiler.cc
diff --git a/base/debug/profiler.cc b/base/debug/profiler.cc
index a4426ab3072af7bfa942141db40ce88e7a30b5d1..b19e7ecd00fcdf5431b4fc6ada16ab44852d6a3f 100644
--- a/base/debug/profiler.cc
+++ b/base/debug/profiler.cc
@@ -154,8 +154,8 @@ bool FindResolutionFunctionInImports(
   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