Update TODOs for clarity and re-enable one disabled test.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=191944101

test/com/google/javascript/jscomp/IntegrationTest.java

@@ -5118,8 +5118,7 @@ public void testInlineRestParam() {
             + "b[a-0]=arguments[a];return b[0]}(8))");
   }
 
-  // TODO(b/69850796): Re-enable when InlineFunctions' FeatureSet is set back to ES6+.
-  public void disabled_testInlineRestParamNonTranspiling() {
+  public void testInlineRestParamNonTranspiling() {
     CompilerOptions options = createCompilerOptions();
     options.setLanguageIn(LanguageMode.ECMASCRIPT_2017);
     options.setLanguageOut(LanguageMode.ECMASCRIPT_2017);
@@ -5198,7 +5197,7 @@ public void testDefaultParameters() {
         "var a={a:9}; a=void 0===a?{a:5}:a;alert(3+a.a)");
   }
 
-  // TODO(b/69850796): Re-enable when InlineFunctions' FeatureSet is set back to ES6+.
+  // TODO(b/69850796): Re-enable if/when InlineFunctions supports inlining default parameters
   public void disabled_testDefaultParametersNonTranspiling() {
     CompilerOptions options = createCompilerOptions();
     CompilationLevel.ADVANCED_OPTIMIZATIONS.setOptionsForCompilationLevel(options);
@@ -5237,7 +5236,8 @@ public void testRestObjectPatternParameters() {
             "}(1,1,1,1,1))"));
   }
 
-  // TODO(b/69850796): Re-enable when InlineFunctions' FeatureSet is set back to ES6+.
+  // TODO(b/69850796): Re-enable if/when InlineFunctions supports rest parameters that are
+  // object patterns.
   public void disabled_testRestObjectPatternParametersNonTranspiling() {
     CompilerOptions options = createCompilerOptions();
     CompilationLevel.ADVANCED_OPTIMIZATIONS.setOptionsForCompilationLevel(options);