Rename InstructionsReader to ImageReader for symmetry with ImageWriter.

runtime/vm/clustered_snapshot.h

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_VM_CLUSTERED_SNAPSHOT_H_
 #define RUNTIME_VM_CLUSTERED_SNAPSHOT_H_
 
 #include "platform/assert.h"
 #include "vm/allocation.h"
 #include "vm/bitfield.h"
@@ skipping 318 matching lines @@
   TokenPosition ReadTokenPosition() {
     return TokenPosition::SnapshotDecode(Read<int32_t>());
   }
 
   intptr_t ReadCid() {
     COMPILE_ASSERT(RawObject::kClassIdTagSize <= 32);
     return Read<int32_t>();
   }
 
   RawInstructions* GetInstructionsAt(int32_t offset) {
-    return instructions_reader_->GetInstructionsAt(offset);
+    return image_reader_->GetInstructionsAt(offset);
   }
 
   RawObject* GetObjectAt(int32_t offset) {
-    return instructions_reader_->GetObjectAt(offset);
+    return image_reader_->GetObjectAt(offset);
   }
 
   RawApiError* VerifyVersionAndFeatures(Isolate* isolate);
 
   void Prepare();
   void Deserialize();
 
   DeserializationCluster* ReadCluster();
 
   intptr_t next_index() const { return next_ref_index_; }
   Heap* heap() const { return heap_; }
   Snapshot::Kind kind() const { return kind_; }
 
  private:
   Heap* heap_;
   Zone* zone_;
   Snapshot::Kind kind_;
   ReadStream stream_;
-  InstructionsReader* instructions_reader_;
+  ImageReader* image_reader_;
   intptr_t num_base_objects_;
   intptr_t num_objects_;
   intptr_t num_clusters_;
   RawArray* refs_;
   intptr_t next_ref_index_;
   DeserializationCluster** clusters_;
 };
 
 
 class FullSnapshotWriter {
@@ skipping 72 matching lines @@
   intptr_t size_;
   const uint8_t* instructions_buffer_;
   const uint8_t* data_buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(FullSnapshotReader);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_CLUSTERED_SNAPSHOT_H_