[fullcodegen] Remove exception handling support.

src/compiler/ast-graph-builder.h

 // Copyright 2014 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_COMPILER_AST_GRAPH_BUILDER_H_
 #define V8_COMPILER_AST_GRAPH_BUILDER_H_
 
 #include "src/ast/ast.h"
 #include "src/compiler/compiler-source-position-table.h"
 #include "src/compiler/js-graph.h"
@@ skipping 53 matching lines @@
 
  private:
   class AstContext;
   class AstEffectContext;
   class AstValueContext;
   class AstTestContext;
   class ContextScope;
   class ControlScope;
   class ControlScopeForBreakable;
   class ControlScopeForIteration;
-  class ControlScopeForCatch;
-  class ControlScopeForFinally;
   class Environment;
   friend class ControlBuilder;
 
   Isolate* isolate_;
   Zone* local_zone_;
   CompilationInfo* info_;
   JSGraph* jsgraph_;
   float const invocation_frequency_;
   Environment* environment_;
   AstContext* ast_context_;
 
   // List of global declarations for functions and variables.
   ZoneVector<Handle<Object>> globals_;
 
   // Stack of control scopes currently entered by the visitor.
   ControlScope* execution_control_;
 
   // Stack of context objects pushed onto the chain by the visitor.
   ContextScope* execution_context_;
 
   // Nodes representing values in the activation record.
   SetOncePointer<Node> function_closure_;
   SetOncePointer<Node> function_context_;
   SetOncePointer<Node> new_target_;
 
-  // Tracks how many try-blocks are currently entered.
-  int try_nesting_level_;
-
   // Temporary storage for building node input lists.
   int input_buffer_size_;
   Node** input_buffer_;
 
   // Optimization to cache loaded feedback vector.
   SetOncePointer<Node> feedback_vector_;
 
   // Optimization to cache empty frame state.
   SetOncePointer<Node> empty_frame_state_;
 
@@ skipping 524 matching lines @@
  private:
   SourcePositionTable* const source_positions_;
   SourcePosition const start_position_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_AST_GRAPH_BUILDER_H_