Make some functions that are hit during renderer startup available for inlining

src/snapshot/snapshot-source-sink.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_SNAPSHOT_SNAPSHOT_SOURCE_SINK_H_
 #define V8_SNAPSHOT_SNAPSHOT_SOURCE_SINK_H_
 
 #include "src/base/logging.h"
 #include "src/utils.h"
 
@@ skipping 20 matching lines @@
 
   bool HasMore() { return position_ < length_; }
 
   byte Get() {
     DCHECK(position_ < length_);
     return data_[position_++];
   }
 
   void Advance(int by) { position_ += by; }
 
-  void CopyRaw(byte* to, int number_of_bytes);
+  void CopyRaw(byte* to, int number_of_bytes) {
+    memcpy(to, data_ + position_, number_of_bytes);
+    position_ += number_of_bytes;
+  }
 
   inline int GetInt() {
     // This way of decoding variable-length encoded integers does not
     // suffer from branch mispredictions.
     DCHECK(position_ + 3 < length_);
     uint32_t answer = data_[position_];
     answer |= data_[position_ + 1] << 8;
     answer |= data_[position_ + 2] << 16;
     answer |= data_[position_ + 3] << 24;
     int bytes = (answer & 3) + 1;
@@ skipping 45 matching lines @@
   const List<byte>* data() const { return &data_; }
 
  private:
   List<byte> data_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_SNAPSHOT_SNAPSHOT_SOURCE_SINK_H_