Implementation of an STL compatible allocator for Courgette on Windows.
This is to better handle low memory situations when applying a differential
patch to a large Chrome setup.

For reading input files, I'm also switching to using memory mapped files
instead of ReadFileToString to reduce the load on the heap.

TEST=courgette.exe should succeed in applying a patch between two
  chrome 10.x archives on an XP machine with 180MB of physical memory and
  no page file.
BUG=72459,73209

Review URL: http://codereview.chromium.org/6597038

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@76320 0039d316-1c4b-4281-b951-d872f2087c98

diff --git a/courgette/adjustment_method_2.cc b/courgette/adjustment_method_2.cc
index cacf33e..e3ca3152 100644
--- a/courgette/adjustment_method_2.cc
+++ b/courgette/adjustment_method_2.cc

@@ -1252,7 +1252,7 @@
   void CollectTraces(const AssemblyProgram* program, Trace* abs32, Trace* rel32,
                      bool is_model) {
     label_info_maker_.ResetDebugLabel();
-    const std::vector<Instruction*>& instructions = program->instructions();
+    const InstructionVector& instructions = program->instructions();
     for (size_t i = 0;  i < instructions.size();  ++i) {
       Instruction* instruction = instructions.at(i);
       if (Label* label = program->InstructionAbs32Label(instruction))