Revert of [crankshaft] Protect against deopt loops from string length overflows.

src/crankshaft/hydrogen.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CRANKSHAFT_HYDROGEN_H_
 #define V8_CRANKSHAFT_HYDROGEN_H_
 
 #include "src/accessors.h"
 #include "src/allocation.h"
 #include "src/ast/ast-type-bounds.h"
@@ skipping 422 matching lines @@
     if (depends_on_empty_array_proto_elements_) return;
     info()->dependencies()->AssumePropertyCell(
         isolate()->factory()->array_protector());
     depends_on_empty_array_proto_elements_ = true;
   }
 
   bool depends_on_empty_array_proto_elements() {
     return depends_on_empty_array_proto_elements_;
   }
 
-  void MarkDependsOnStringLengthOverflow() {
-    if (depends_on_string_length_overflow_) return;
-    info()->dependencies()->AssumePropertyCell(
-        isolate()->factory()->string_length_protector());
-    depends_on_string_length_overflow_ = true;
-  }
-
   bool has_uint32_instructions() {
     DCHECK(uint32_instructions_ == NULL || !uint32_instructions_->is_empty());
     return uint32_instructions_ != NULL;
   }
 
   ZoneList<HInstruction*>* uint32_instructions() {
     DCHECK(uint32_instructions_ == NULL || !uint32_instructions_->is_empty());
     return uint32_instructions_;
   }
 
@@ skipping 55 matching lines @@
 
   HOsrBuilder* osr_;
 
   CompilationInfo* info_;
   CallInterfaceDescriptor descriptor_;
   Zone* zone_;
 
   bool allow_code_motion_;
   bool use_optimistic_licm_;
   bool depends_on_empty_array_proto_elements_;
-  bool depends_on_string_length_overflow_;
   int type_change_checksum_;
   int maximum_environment_size_;
   int no_side_effects_scope_count_;
   bool disallow_adding_new_values_;
 
   ZoneVector<HInlinedFunctionInfo> inlined_function_infos_;
 
   DISALLOW_COPY_AND_ASSIGN(HGraph);
 };
 
@@ skipping 2513 matching lines @@
   }
 
  private:
   HOptimizedGraphBuilder* builder_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_HYDROGEN_H_