[wasm][interpreter] Remove RaiseException

This method was there to turn a trap into an exception. It's not used
any more, so can be removed.

R=ahaas@chromium.org

Bug: v8:10389
Change-Id: I39bb3141722ddf1e09271348016c1d6f6d72b928
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2264103Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68534}

test/common/wasm/wasm-interpreter.cc

@@ -1184,18 +1184,6 @@ class WasmInterpreterInternals {
 
   uint64_t NumInterpretedCalls() { return num_interpreted_calls_; }
 
-  WasmInterpreter::ExceptionHandlingResult RaiseException(
-      Isolate* isolate, Handle<Object> exception) {
-    DCHECK_EQ(WasmInterpreter::TRAPPED, state_);
-    isolate->Throw(*exception);  // Will check that none is pending.
-    if (HandleException(isolate) == WasmInterpreter::UNWOUND) {
-      DCHECK_EQ(WasmInterpreter::STOPPED, state_);
-      return WasmInterpreter::UNWOUND;
-    }
-    state_ = WasmInterpreter::PAUSED;
-    return WasmInterpreter::HANDLED;
-  }
-
   CodeMap* codemap() { return &codemap_; }
 
  private:

test/common/wasm/wasm-interpreter.h

@@ -49,10 +49,9 @@ class WasmInterpreter {
   //    |                    +--------Run()/Step()---------+       |
   //    V                    V                             |       |
   // STOPPED ---Run()-->  RUNNING  ------Pause()-----+-> PAUSED <--+
-  //    ^                 | | | |                   /              |
-  //    +--- Exception ---+ | | +--- Breakpoint ---+       RaiseException() <--+
-  //                        | |                                                |
-  //                        | +---------- Trap --------------> TRAPPED --------+
+  //    ^                 | | | |                   /
+  //    +--- Exception ---+ | | +--- Breakpoint ---+
+  //                        | +---------- Trap --------------> TRAPPED
   //                        +----------- Finish -------------> FINISHED
   enum State { STOPPED, RUNNING, PAUSED, FINISHED, TRAPPED };
 
@@ -75,12 +74,6 @@ class WasmInterpreter {
   void Pause();
   void Reset();
 
-  // Raise an exception in the current activation and unwind the stack
-  // accordingly. Return whether the exception was handled inside wasm:
-  //  - HANDLED: Activation at handler position and in {PAUSED} state.
-  //  - UNWOUND: Frames unwound, exception pending, and in {STOPPED} state.
-  ExceptionHandlingResult RaiseException(Isolate*, Handle<Object> exception);
-
   // Stack inspection and modification.
   WasmValue GetReturnValue(int index = 0);
   TrapReason GetTrapReason();