Replace most LOG/CHECK statements with DLOG/DCHECK statements in base.

[ Reland of 107042 http://codereview.chromium.org/8368009 ]

I tried hard not to change CHECKs that had side effects. I kept fatal checks
that seemed security or debugging-info (in crash reports) sensitive, and ones
that seems particularly well-conceived.
Review URL: http://codereview.chromium.org/8341026

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@107434 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/base/shared_memory_win.cc b/base/shared_memory_win.cc
index 526132c..3e5ad36 100644
--- a/base/shared_memory_win.cc
+++ b/base/shared_memory_win.cc
@@ -206,7 +206,7 @@
     name.append(L"lock");
     lock_ = CreateMutex(sec_attr, FALSE, name.c_str());
     if (lock_ == NULL) {
-      PLOG(ERROR) << "Could not create mutex.";
+      DPLOG(ERROR) << "Could not create mutex.";
       return false;  // there is nothing good we can do here.
     }
   }