Stage ES6 arrow functions

R=rossberg@chromium.org
BUG=v8:2700
LOG=Y

Review URL: https://codereview.chromium.org/1166303004

Cr-Commit-Position: refs/heads/master@{#28863}

src/flag-definitions.h

@@ -186,7 +186,6 @@ DEFINE_IMPLICATION(es_staging, harmony)
   V(harmony_modules, "harmony modules")                         \
   V(harmony_array_includes, "harmony Array.prototype.includes") \
   V(harmony_regexps, "harmony regular expression extensions")   \
-  V(harmony_arrow_functions, "harmony arrow functions")         \
   V(harmony_proxies, "harmony proxies")                         \
   V(harmony_sloppy, "harmony features in sloppy mode")          \
   V(harmony_unicode_regexps, "harmony unicode regexps")         \
@@ -198,6 +197,7 @@ DEFINE_IMPLICATION(es_staging, harmony)
 // Features that are complete (but still behind --harmony/es-staging flag).
 #define HARMONY_STAGED(V)                                      \
   V(harmony_arrays, "harmony array methods")                   \
+  V(harmony_arrow_functions, "harmony arrow functions")        \
   V(harmony_rest_parameters, "harmony rest parameters")        \
   V(harmony_spreadcalls, "harmony spread-calls")               \
   V(harmony_object, "harmony Object methods")                  \

test/test262-es6/test262-es6.status

@@ -179,7 +179,6 @@
   'built-ins/Array/prototype/filter/15.4.4.20-3-7': [FAIL],
   'built-ins/Array/prototype/find/Array.prototype.find_callable-Proxy-1': [FAIL],
   'built-ins/Array/prototype/find/Array.prototype.find_callable-Proxy-2': [FAIL],
-  'built-ins/Array/prototype/find/Array.prototype.find_callable-arrowfunction': [FAIL],
   'built-ins/Array/prototype/forEach/15.4.4.18-3-12': [FAIL],
   'built-ins/Array/prototype/forEach/15.4.4.18-3-25': [FAIL],
   'built-ins/Array/prototype/forEach/15.4.4.18-3-7': [FAIL],
@@ -289,9 +288,6 @@
   'intl402/13.3.1_L15': [FAIL],
   'intl402/13.3.2_L15': [FAIL],
   'intl402/13.3.3_L15': [FAIL],
-  'language/arrow-function/Arrow-Function_rules-for-prototype': [FAIL],
-  'language/arrow-function/Arrow-Function_semantics': [FAIL],
-  'language/arrow-function/Arrow-Function_syntax-variations': [FAIL],
   'language/class/arguments/access': [FAIL],
   'language/class/arguments/default-constructor': [FAIL],
   'language/class/definition/accessors': [FAIL],