Make SPDY logging use QUICHE logging

Also replace (D)CHECK with QUICHE_(D)CHECK.

PiperOrigin-RevId: 355027342
Change-Id: I34991423c2679c0f045aba870509dfa57674f556
diff --git a/spdy/core/spdy_prefixed_buffer_reader.cc b/spdy/core/spdy_prefixed_buffer_reader.cc
index 7a9faac..0cb07cf 100644
--- a/spdy/core/spdy_prefixed_buffer_reader.cc
+++ b/spdy/core/spdy_prefixed_buffer_reader.cc
@@ -41,7 +41,7 @@
     prefix_length_ = 0;
     // Fallthrough to suffix read.
   }
-  DCHECK(suffix_length_ >= count);
+  QUICHE_DCHECK(suffix_length_ >= count);
   // Read is satisfied by the suffix.
   std::copy(suffix_, suffix_ + count, out);
   suffix_ += count;
@@ -72,7 +72,7 @@
     ReadN(count, out->storage_.get());
     return true;
   } else {
-    DCHECK(suffix_length_ >= count);
+    QUICHE_DCHECK(suffix_length_ >= count);
     // Read is fully satisfied by the suffix.
     out->buffer_ = suffix_;
     suffix_ += count;