Rename LChunkBase to LChunk, LChunk to LPlatformChunk and remove some unneeded explicit constructor…

src/lithium-allocator.cc

Index: src/lithium-allocator.cc
diff --git a/src/lithium-allocator.cc b/src/lithium-allocator.cc
index 9134f373f3d495f5a44fa1f58e3bc6966d933522..91a98112b61bd60a50b56d98f8ca4eebacdf01ff 100644
--- a/src/lithium-allocator.cc
+++ b/src/lithium-allocator.cc
@@ -1062,9 +1062,9 @@ void LAllocator::ResolvePhis(HBasicBlock* block) {
 }
 
 
-bool LAllocator::Allocate(LChunkBase* chunk) {
+bool LAllocator::Allocate(LChunk* chunk) {
   ASSERT(chunk_ == NULL);
-  chunk_ = static_cast<LChunk*>(chunk);
+  chunk_ = static_cast<LPlatformChunk*>(chunk);
   MeetRegisterConstraints();
   if (!AllocationOk()) return false;
   ResolvePhis();