Change a few style issues (dead code, unitialized members) flagged by

Coverity Prevent.  All are benign.

Review URL: http://codereview.chromium.org/159264

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2525 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/bootstrapper.cc

@@ -47,14 +47,10 @@ namespace internal {
 // generate an index for each native JS file.
 class SourceCodeCache BASE_EMBEDDED {
  public:
-  explicit SourceCodeCache(Script::Type type): type_(type) { }
+  explicit SourceCodeCache(Script::Type type): type_(type), cache_(NULL) { }
 
   void Initialize(bool create_heap_objects) {
-    if (create_heap_objects) {
-      cache_ = Heap::empty_fixed_array();
-    } else {
-      cache_ = NULL;
-    }
+    cache_ = create_heap_objects ? Heap::empty_fixed_array() : NULL;
   }
 
   void Iterate(ObjectVisitor* v) {

src/rewriter.cc

@@ -38,8 +38,9 @@ namespace internal {
 
 class AstOptimizer: public AstVisitor {
  public:
-  explicit AstOptimizer() {}
-  explicit AstOptimizer(Handle<String> enclosing_name) {
+  explicit AstOptimizer() : has_function_literal_(false) {}
+  explicit AstOptimizer(Handle<String> enclosing_name)
+      : has_function_literal_(false) {
     func_name_inferrer_.PushEnclosingName(enclosing_name);
   }
 

src/spaces.cc

@@ -133,8 +133,6 @@ PageIterator::PageIterator(PagedSpace* space, Mode mode) : space_(space) {
 #endif
       stop_page_ = space->last_page_;
       break;
-    default:
-      UNREACHABLE();
   }
 }