Revert "frames.h/cc cleanup"

This reverts r14496 which broke tests in debug mode:

Command: /mnt/data/b/build/slave/v8-linux-nosnap-debug/build/v8/out/Debug/cctest test-log/LogAccessorCallbacks --nobreak-on-abort --nodead-code-elimination --nofold-constants --enable-slow-asserts --debug-code --verify-heap --testing_serialization_file=/mnt/data/b/build/slave/v8-linux-nosnap-debug/build/v8/out/.serdes/serdes_LogAccessorCallbacks
=== cctest/test-log/LogCallbacks ===
--- stderr ---

TBR=jkummerow@chromium.org
BUG=None

Review URL: https://codereview.chromium.org/14651004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14502 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/frames.cc

@@ -168,6 +168,7 @@ void StackFrameIterator::Reset() {
         reinterpret_cast<Address*>(StandardFrame::ComputePCAddress(fp_)));
     type = StackFrame::ComputeType(isolate(), &state);
   }
+  if (SingletonFor(type) == NULL) return;
   frame_ = SingletonFor(type, &state);
 }
 

src/frames.h

@@ -969,11 +969,9 @@ typedef JavaScriptFrameIteratorTemp<SafeStackFrameIterator>
 
 class SafeStackTraceFrameIterator: public SafeJavaScriptFrameIterator {
  public:
-  SafeStackTraceFrameIterator(Isolate* isolate,
-                              Address fp,
-                              Address sp,
-                              Address low_bound,
-                              Address high_bound);
+  explicit SafeStackTraceFrameIterator(Isolate* isolate,
+                                       Address fp, Address sp,
+                                       Address low_bound, Address high_bound);
   void Advance();
 };