Adapt fragmentation heuristics for over reserved pages.

test/cctest/test-alloc.cc

Index: test/cctest/test-alloc.cc
diff --git a/test/cctest/test-alloc.cc b/test/cctest/test-alloc.cc
index e195d14923ef324dea976cd94aa2ec3d52594196..a8e504fd443a6c77dddfbde352c372f11206a569 100644
--- a/test/cctest/test-alloc.cc
+++ b/test/cctest/test-alloc.cc
@@ -34,7 +34,8 @@
 using namespace v8::internal;
 
 
-static inline void SimulateFullSpace(PagedSpace* space) {
+// Also used in test-heap.cc test cases.
+void SimulateFullSpace(PagedSpace* space) {
   int old_linear_size = static_cast<int>(space->limit() - space->top());
   space->Free(space->top(), old_linear_size);
   space->SetTop(space->limit(), space->limit());