Next base/macros.h cleanup step.

src/base/platform/platform-win32.cc

Index: src/base/platform/platform-win32.cc
diff --git a/src/base/platform/platform-win32.cc b/src/base/platform/platform-win32.cc
index 3066bc2e6316edd0520a9783120d189d4e364ac1..3070139de710deb97d8b1b842d1aba8c93605e7d 100644
--- a/src/base/platform/platform-win32.cc
+++ b/src/base/platform/platform-win32.cc
@@ -786,7 +786,7 @@ void* OS::Allocate(const size_t requested,
 
   if (mbase == NULL) return NULL;
 
-  DCHECK(IsAligned(reinterpret_cast<size_t>(mbase), OS::AllocateAlignment()));
+  DCHECK((static_cast<uintptr_t>(mbase) % OS::AllocateAlignment()) == 0);
 
   *allocated = msize;
   return mbase;
@@ -1205,7 +1205,7 @@ VirtualMemory::VirtualMemory(size_t size)
 
 VirtualMemory::VirtualMemory(size_t size, size_t alignment)
     : address_(NULL), size_(0) {
-  DCHECK(IsAligned(alignment, static_cast<intptr_t>(OS::AllocateAlignment())));
+  DCHECK((alignment % OS::AllocateAlignment()) == 0);
   size_t request_size = RoundUp(size + alignment,
                                 static_cast<intptr_t>(OS::AllocateAlignment()));
   void* address = ReserveRegion(request_size);