Handle frame pointer omission (#21), part 3: SourceLineResolver and PDBSourceLineWriter changes. r=bryner.

- PDBSourceLineWriter (dump_syms) outputs stack frame debugging information
 - SourceLineResolver reads the new information and puts it into a
   new StackFrameInfo structure, which is stored in a ContainedRangeMap.
   FillSourceLineInfo passes the StackFrameInfo back to the caller.
 - The base Stackwalker makes StackFrameInfo data available to subclasses
   during stackwalking, but does not use this information directly itself.
   Stackwalkers may access stack_frame_info_ for enhanced stackwalking
   (this will be part 4).
 - New test data for the updated dumped-symbol format

http://groups.google.com/group/airbag-dev/browse_thread/thread/735f191c9a1a1de4


git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@38 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/processor/stackwalker.h

@@ -42,9 +42,11 @@
 #ifndef PROCESSOR_STACKWALKER_H__
 #define PROCESSOR_STACKWALKER_H__
 
+#include <vector>
 
 #include "google/stack_frame.h"
 #include "processor/memory_region.h"
+#include "processor/stack_frame_info.h"
 
 namespace google_airbag {
 
@@ -85,6 +87,11 @@ class Stackwalker {
   // get information from the stack.
   MemoryRegion *memory_;
 
+  // Additional debugging information for each stack frame.  This vector
+  // parallels the StackFrames vector.  Subclasses may use this information
+  // to walk the stack.
+  std::vector<StackFrameInfo> stack_frame_info_;
+
  private:
   // Obtains the context frame, the innermost called procedure in a stack
   // trace.  Returns false on failure.