Update AshmemRegion::highest_allocated_chunk_ when merging free chunks.

base/memory/discardable_memory_allocator_android_unittest.cc

Index: base/memory/discardable_memory_allocator_android_unittest.cc
diff --git a/base/memory/discardable_memory_allocator_android_unittest.cc b/base/memory/discardable_memory_allocator_android_unittest.cc
index 3f756047ae8ae7c7534d254ddc5e8a0bf2cd438b..b2e8d558608fb03c6f5a5142e63f1d30ef30009b 100644
--- a/base/memory/discardable_memory_allocator_android_unittest.cc
+++ b/base/memory/discardable_memory_allocator_android_unittest.cc
@@ -271,8 +271,6 @@ TEST_F(DiscardableMemoryAllocatorTest, UseMultipleAshmemRegions) {
 
 TEST_F(DiscardableMemoryAllocatorTest,
        HighestAllocatedChunkPointerIsUpdatedWhenHighestChunkGetsSplit) {
-  DiscardableMemoryAllocator allocator_(kAllocatorName, 32 * kPageSize);

[Philippe, 2014/03/05 15:36:03]

FYI, I just uploaded a patch set removing this (which was wrongly added in the
previous CL). |allocator_| is provided by the fixture class instead.

-
   // Prevents the ashmem region from getting closed when |memory2| gets freed.
   scoped_ptr<DiscardableMemory> memory1(allocator_.Allocate(kPageSize));
   ASSERT_TRUE(memory1);