Update V8 to version 4.1.0.21

This is a cherry-pick of all commits up to and including the
4.1.0.21 cherry-pick in Chromium.

Original commit message:

Version 4.1.0.21 (cherry-pick)

Merged 206e9136bde0f2b5ae8cb77afbb1e7833e5bd412

Unlink pages from the space page list after evacuation.

BUG=430201
LOG=N
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/953813002

Cr-Commit-Position: refs/branch-heads/4.1@{#22}
Cr-Branched-From: 2e08d2a7aa9d65d269d8c57aba82eb38a8cb0a18-refs/heads/candidates@{#25353}

---

FPIIM-449

Change-Id: I8c23c7bbb70772b4858fe8a47b64fa97ee0d1f8c
diff --git a/src/log-inl.h b/src/log-inl.h
index 28677ad..a96631d 100644
--- a/src/log-inl.h
+++ b/src/log-inl.h
@@ -6,6 +6,7 @@
 #define V8_LOG_INL_H_
 
 #include "src/log.h"
+#include "src/isolate.h"
 
 namespace v8 {
 namespace internal {
@@ -26,6 +27,16 @@
 }
 
 
+void Logger::CallEventLogger(Isolate* isolate, const char* name, StartEnd se,
+                             bool expose_to_api) {
+  if (isolate->event_logger() != NULL) {
+    if (isolate->event_logger() == DefaultEventLoggerSentinel) {
+      LOG(isolate, TimerEvent(se, name));
+    } else if (expose_to_api) {
+      isolate->event_logger()(name, se);
+    }
+  }
+}
 } }  // namespace v8::internal
 
 #endif  // V8_LOG_INL_H_