Improve the casing of Stackmap and Stacktrace.

runtime/vm/precompiler.h

Index: runtime/vm/precompiler.h
diff --git a/runtime/vm/precompiler.h b/runtime/vm/precompiler.h
index 9f2ca90d67ad987b59f2e579d66572be0fa0752e..b7633635d227c412d3514fd4da9221698e49b8f8 100644
--- a/runtime/vm/precompiler.h
+++ b/runtime/vm/precompiler.h
@@ -78,12 +78,12 @@ class SymbolKeyValueTrait {
 
 typedef DirectChainedHashMap<SymbolKeyValueTrait> SymbolSet;
 
-class StackmapKeyValueTrait {
+class StackMapKeyValueTrait {
  public:
   // Typedefs needed for the DirectChainedHashMap template.
-  typedef const Stackmap* Key;
-  typedef const Stackmap* Value;
-  typedef const Stackmap* Pair;
+  typedef const StackMap* Key;
+  typedef const StackMap* Value;
+  typedef const StackMap* Pair;
 
   static Key KeyOf(Pair kv) { return kv; }
 
@@ -96,7 +96,7 @@ class StackmapKeyValueTrait {
   }
 };
 
-typedef DirectChainedHashMap<StackmapKeyValueTrait> StackmapSet;
+typedef DirectChainedHashMap<StackMapKeyValueTrait> StackMapSet;
 
 
 class ArrayKeyValueTrait {
@@ -393,7 +393,7 @@ class Precompiler : public ValueObject {
   void BindStaticCalls();
   void SwitchICCalls();
   void ShareMegamorphicBuckets();
-  void DedupStackmaps();
+  void DedupStackMaps();
   void DedupLists();
   void DedupInstructions();
   void ResetPrecompilerState();