blink_gc_plugin: retire overloaded traceImpl detection and handling.

tools/clang/blink_gc_plugin/Config.h

Index: tools/clang/blink_gc_plugin/Config.h
diff --git a/tools/clang/blink_gc_plugin/Config.h b/tools/clang/blink_gc_plugin/Config.h
index 2ab933f382dd6d1eb4f336ad4c3ceae00647904a..f0c4aeca33bacd8a434dd0048bffe842225abb1d 100644
--- a/tools/clang/blink_gc_plugin/Config.h
+++ b/tools/clang/blink_gc_plugin/Config.h
@@ -20,10 +20,8 @@
 extern const char kNewOperatorName[];
 extern const char* kCreateName;
 extern const char* kTraceName;
-extern const char* kTraceImplName;
 extern const char* kFinalizeName;
 extern const char* kTraceAfterDispatchName;
-extern const char* kTraceAfterDispatchImplName;
 extern const char* kRegisterWeakMembersName;
 extern const char kHeapAllocatorName[];
 extern const char kTraceIfNeededName[];
@@ -219,8 +217,6 @@ class Config {
     NOT_TRACE_METHOD,
     TRACE_METHOD,
     TRACE_AFTER_DISPATCH_METHOD,
-    TRACE_IMPL_METHOD,
-    TRACE_AFTER_DISPATCH_IMPL_METHOD
   };
 
   static TraceMethodType GetTraceMethodType(const clang::FunctionDecl* method) {
@@ -228,15 +224,11 @@ class Config {
       return NOT_TRACE_METHOD;
 
     const std::string& name = method->getNameAsString();
-    if (name != kTraceName && name != kTraceAfterDispatchName &&
-        name != kTraceImplName && name != kTraceAfterDispatchImplName)
+    if (name != kTraceName && name != kTraceAfterDispatchName)
       return NOT_TRACE_METHOD;
 
     const clang::QualType& formal_type = method->getParamDecl(0)->getType();
-    if (name == kTraceImplName || name == kTraceAfterDispatchImplName) {
-      if (!IsVisitorDispatcherType(formal_type))
-        return NOT_TRACE_METHOD;
-    } else if (!IsVisitorPtrType(formal_type)) {
+    if (!IsVisitorPtrType(formal_type)) {
       return NOT_TRACE_METHOD;
     }
 
@@ -244,10 +236,6 @@ class Config {
       return TRACE_METHOD;
     if (name == kTraceAfterDispatchName)
       return TRACE_AFTER_DISPATCH_METHOD;
-    if (name == kTraceImplName)
-      return TRACE_IMPL_METHOD;
-    if (name == kTraceAfterDispatchImplName)
-      return TRACE_AFTER_DISPATCH_IMPL_METHOD;
 
     assert(false && "Should not reach here");
     return NOT_TRACE_METHOD;
@@ -257,10 +245,6 @@ class Config {
     return GetTraceMethodType(method) != NOT_TRACE_METHOD;
   }
 
-  static bool IsTraceImplName(const std::string& name) {
-    return name == kTraceImplName || name == kTraceAfterDispatchImplName;
-  }
-
   static bool StartsWith(const std::string& str, const std::string& prefix) {
     if (prefix.size() > str.size())
       return false;