Remove two static initializers (media/base/{buffers,media_log}.cc)

media/base/seekable_buffer.cc

Index: media/base/seekable_buffer.cc
diff --git a/media/base/seekable_buffer.cc b/media/base/seekable_buffer.cc
index 2e3180a926c5856dfa7b4bc63b5aa6e5e0612afd..5607e972706b6186c9bf825c542b97a51438d256 100644
--- a/media/base/seekable_buffer.cc
+++ b/media/base/seekable_buffer.cc
@@ -18,7 +18,7 @@ SeekableBuffer::SeekableBuffer(size_t backward_capacity,
       backward_bytes_(0),
       forward_capacity_(forward_capacity),
       forward_bytes_(0),
-      current_time_(kNoTimestamp) {
+      current_time_(kNoTimestamp()) {
   current_buffer_ = buffers_.begin();
 }
 
@@ -31,7 +31,7 @@ void SeekableBuffer::Clear() {
   current_buffer_offset_ = 0;
   backward_bytes_ = 0;
   forward_bytes_ = 0;
-  current_time_ = kNoTimestamp;
+  current_time_ = kNoTimestamp();
 }
 
 size_t SeekableBuffer::Read(uint8* data, size_t size) {