Implement a space filter for optimizing.

Heuristic-based. Currently only for enabling fugu user build.

Change-Id: I76e652bd3f00ed84a2a8ad69c7c2c0e24d74cd68
diff --git a/compiler/optimizing/optimizing_compiler_stats.h b/compiler/optimizing/optimizing_compiler_stats.h
index 3ebf0f8..22ec2a5 100644
--- a/compiler/optimizing/optimizing_compiler_stats.h
+++ b/compiler/optimizing/optimizing_compiler_stats.h
@@ -38,6 +38,7 @@
   kNotCompiledUnresolvedMethod,
   kNotCompiledUnresolvedField,
   kNotCompiledNonSequentialRegPair,
+  kNotCompiledSpaceFilter,
   kNotOptimizedTryCatch,
   kNotOptimizedDisabled,
   kNotCompiledCantAccesType,
@@ -96,6 +97,7 @@
       case kNotOptimizedDisabled : return "kNotOptimizedDisabled";
       case kNotOptimizedTryCatch : return "kNotOptimizedTryCatch";
       case kNotCompiledCantAccesType : return "kNotCompiledCantAccesType";
+      case kNotCompiledSpaceFilter : return "kNotCompiledSpaceFilter";
       case kNotOptimizedRegisterAllocator : return "kNotOptimizedRegisterAllocator";
       case kNotCompiledUnhandledInstruction : return "kNotCompiledUnhandledInstruction";
       case kRemovedCheckedCast: return "kRemovedCheckedCast";