Fix a couple of pointer DCHECKs

base/debug/profiler.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/debug/profiler.h"
 
 #include <string>
 
 #include "base/debug/debugging_flags.h"
 #include "base/process/process_handle.h"
@@ skipping 136 matching lines @@
 };
 
 // Callback function to PEImage::EnumImportChunks.
 bool FindResolutionFunctionInImports(
     const base::win::PEImage &image, const char* module_name,
     PIMAGE_THUNK_DATA unused_name_table, PIMAGE_THUNK_DATA import_address_table,
     PVOID cookie) {
   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
   // find the module this import was resolved to by the loader.
   const wchar_t* function_in_module =
       reinterpret_cast<const wchar_t*>(import_address_table->u1.Function);
 
   // Retrieve the module by a function in the module.
   const DWORD kFlags = GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
                        GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT;
@@ skipping 47 matching lines @@
 
 MoveDynamicSymbol GetProfilerMoveDynamicSymbolFunc() {
   return FindFunctionInImports<MoveDynamicSymbol>(
       "MoveDynamicSymbol");
 }
 
 #endif  // defined(OS_WIN)
 
 }  // namespace debug
 }  // namespace base