Revert of Use v8::MicrotasksScope internally in V8RecursionScope.

third_party/WebKit/Source/core/streams/ReadableStreamTest.cpp

Index: third_party/WebKit/Source/core/streams/ReadableStreamTest.cpp
diff --git a/third_party/WebKit/Source/core/streams/ReadableStreamTest.cpp b/third_party/WebKit/Source/core/streams/ReadableStreamTest.cpp
index 8ee42c8392f5c761fb0d6482a7e9dd60b3ac25ae..63aa1a2557b023c9dc67098decf7e90ec2fc05d6 100644
--- a/third_party/WebKit/Source/core/streams/ReadableStreamTest.cpp
+++ b/third_party/WebKit/Source/core/streams/ReadableStreamTest.cpp
@@ -304,7 +304,7 @@ TEST_F(ReadableStreamTest, CloseWhenReadable)
 
     stream->read(getScriptState());
 
-    v8::MicrotasksScope::PerformCheckpoint(isolate());
+    isolate()->RunMicrotasks();
 
     EXPECT_EQ(ReadableStream::Readable, stream->stateInternal());
     EXPECT_FALSE(stream->isPulling());
@@ -335,7 +335,7 @@ TEST_F(ReadableStreamTest, CancelWhenClosed)
     EXPECT_TRUE(onFulfilled.isNull());
     EXPECT_TRUE(onRejected.isNull());
 
-    v8::MicrotasksScope::PerformCheckpoint(isolate());
+    isolate()->RunMicrotasks();
     EXPECT_EQ("undefined", onFulfilled);
     EXPECT_TRUE(onRejected.isNull());
 }
@@ -358,7 +358,7 @@ TEST_F(ReadableStreamTest, CancelWhenErrored)
     EXPECT_TRUE(onFulfilled.isNull());
     EXPECT_TRUE(onRejected.isNull());
 
-    v8::MicrotasksScope::PerformCheckpoint(isolate());
+    isolate()->RunMicrotasks();
     EXPECT_TRUE(onFulfilled.isNull());
     EXPECT_EQ("NotFoundError: error", onRejected);
 }
@@ -392,7 +392,7 @@ TEST_F(ReadableStreamTest, CancelWhenReadable)
     EXPECT_TRUE(onCancelFulfilled.isNull());
     EXPECT_TRUE(onCancelRejected.isNull());
 
-    v8::MicrotasksScope::PerformCheckpoint(isolate());
+    isolate()->RunMicrotasks();
     EXPECT_EQ("undefined", onCancelFulfilled);
     EXPECT_TRUE(onCancelRejected.isNull());
 }
@@ -416,7 +416,7 @@ TEST_F(ReadableStreamTest, CancelWhenLocked)
     EXPECT_TRUE(onFulfilled.isNull());
     EXPECT_TRUE(onRejected.isNull());
 
-    v8::MicrotasksScope::PerformCheckpoint(isolate());
+    isolate()->RunMicrotasks();
 
     EXPECT_TRUE(onFulfilled.isNull());
     EXPECT_EQ("TypeError: this stream is locked to a ReadableStreamReader", onRejected);
@@ -563,7 +563,7 @@ TEST_F(ReadableStreamTest, GetClosedReader)
     EXPECT_TRUE(onFulfilled.isNull());
     EXPECT_TRUE(onRejected.isNull());
 
-    v8::MicrotasksScope::PerformCheckpoint(isolate());
+    isolate()->RunMicrotasks();
     EXPECT_EQ("undefined", onFulfilled);
     EXPECT_TRUE(onRejected.isNull());
 }
@@ -586,7 +586,7 @@ TEST_F(ReadableStreamTest, GetErroredReader)
     EXPECT_TRUE(onFulfilled.isNull());
     EXPECT_TRUE(onRejected.isNull());
 
-    v8::MicrotasksScope::PerformCheckpoint(isolate());
+    isolate()->RunMicrotasks();
     EXPECT_TRUE(onFulfilled.isNull());
     EXPECT_EQ("SyntaxError: some error", onRejected);
 }