[ObjC] Simplify root registry generation.

The the distinction in the output isn't worth it.

PiperOrigin-RevId: 556828871

objectivec/GPBAny.pbobjc.m

@@ -28,8 +28,8 @@ GPBObjCClassDeclaration(GPBAny);
 
 @implementation GPBAnyRoot
 
-// No extensions in the file and no imports, so no need to generate
-// +extensionRegistry.
+// No extensions in the file and no imports or none of the imports (direct or
+// indirect) defined extensions, so no need to generate +extensionRegistry.
 
 @end
 

objectivec/GPBApi.pbobjc.m

@@ -32,8 +32,8 @@ GPBObjCClassDeclaration(GPBSourceContext);
 
 @implementation GPBApiRoot
 
-// No extensions in the file and none of the imports (direct or indirect)
-// defined extensions, so no need to generate +extensionRegistry.
+// No extensions in the file and no imports or none of the imports (direct or
+// indirect) defined extensions, so no need to generate +extensionRegistry.
 
 @end
 

objectivec/GPBDuration.pbobjc.m

@@ -28,8 +28,8 @@ GPBObjCClassDeclaration(GPBDuration);
 
 @implementation GPBDurationRoot
 
-// No extensions in the file and no imports, so no need to generate
-// +extensionRegistry.
+// No extensions in the file and no imports or none of the imports (direct or
+// indirect) defined extensions, so no need to generate +extensionRegistry.
 
 @end
 

objectivec/GPBEmpty.pbobjc.m

@@ -28,8 +28,8 @@ GPBObjCClassDeclaration(GPBEmpty);
 
 @implementation GPBEmptyRoot
 
-// No extensions in the file and no imports, so no need to generate
-// +extensionRegistry.
+// No extensions in the file and no imports or none of the imports (direct or
+// indirect) defined extensions, so no need to generate +extensionRegistry.
 
 @end
 

objectivec/GPBFieldMask.pbobjc.m

@@ -28,8 +28,8 @@ GPBObjCClassDeclaration(GPBFieldMask);
 
 @implementation GPBFieldMaskRoot
 
-// No extensions in the file and no imports, so no need to generate
-// +extensionRegistry.
+// No extensions in the file and no imports or none of the imports (direct or
+// indirect) defined extensions, so no need to generate +extensionRegistry.
 
 @end
 

objectivec/GPBSourceContext.pbobjc.m

@@ -28,8 +28,8 @@ GPBObjCClassDeclaration(GPBSourceContext);
 
 @implementation GPBSourceContextRoot
 
-// No extensions in the file and no imports, so no need to generate
-// +extensionRegistry.
+// No extensions in the file and no imports or none of the imports (direct or
+// indirect) defined extensions, so no need to generate +extensionRegistry.
 
 @end
 

objectivec/GPBStruct.pbobjc.m

@@ -33,8 +33,8 @@ GPBObjCClassDeclaration(GPBValue);
 
 @implementation GPBStructRoot
 
-// No extensions in the file and no imports, so no need to generate
-// +extensionRegistry.
+// No extensions in the file and no imports or none of the imports (direct or
+// indirect) defined extensions, so no need to generate +extensionRegistry.
 
 @end
 

objectivec/GPBTimestamp.pbobjc.m

@@ -28,8 +28,8 @@ GPBObjCClassDeclaration(GPBTimestamp);
 
 @implementation GPBTimestampRoot
 
-// No extensions in the file and no imports, so no need to generate
-// +extensionRegistry.
+// No extensions in the file and no imports or none of the imports (direct or
+// indirect) defined extensions, so no need to generate +extensionRegistry.
 
 @end
 

objectivec/GPBType.pbobjc.m

@@ -36,8 +36,8 @@ GPBObjCClassDeclaration(GPBType);
 
 @implementation GPBTypeRoot
 
-// No extensions in the file and none of the imports (direct or indirect)
-// defined extensions, so no need to generate +extensionRegistry.
+// No extensions in the file and no imports or none of the imports (direct or
+// indirect) defined extensions, so no need to generate +extensionRegistry.
 
 @end
 

objectivec/GPBWrappers.pbobjc.m

@@ -36,8 +36,8 @@ GPBObjCClassDeclaration(GPBUInt64Value);
 
 @implementation GPBWrappersRoot
 
-// No extensions in the file and no imports, so no need to generate
-// +extensionRegistry.
+// No extensions in the file and no imports or none of the imports (direct or
+// indirect) defined extensions, so no need to generate +extensionRegistry.
 
 @end
 

src/google/protobuf/compiler/objectivec/file.cc

@@ -629,17 +629,10 @@ void FileGenerator::EmitRootImplementation(
   // output a registry to override to create the file specific
   // registry.
   if (extension_generators_.empty() && deps_with_extensions.empty()) {
-    if (file_->dependency_count() == 0) {
-      p->Emit(R"objc(
-        // No extensions in the file and no imports, so no need to generate
-        // +extensionRegistry.
-      )objc");
-    } else {
-      p->Emit(R"objc(
-        // No extensions in the file and none of the imports (direct or indirect)
-        // defined extensions, so no need to generate +extensionRegistry.
-      )objc");
-    }
+    p->Emit(R"objc(
+      // No extensions in the file and no imports or none of the imports (direct or
+      // indirect) defined extensions, so no need to generate +extensionRegistry.
+    )objc");
   } else {
     EmitRootExtensionRegistryImplementation(p, deps_with_extensions);
   }