Revert of [profiler] Add extra CHECK to track down crbug.com/665398 (patchset...

Revert of [profiler] Add extra CHECK to track down crbug.com/665398 (patchset #1 id:1 of https://codereview.chromium.org/2556833003/ )

Reason for revert:
Not needed anymore. The bug is fixed.

Original issue's description:
> [profiler] Add extra CHECK to track down crbug.com/665398
>
> BUG=chromium:665398
>
> Committed: https://crrev.com/dfc0bb63a1bc115d39f29cfc338aed5676578c4b
> Cr-Commit-Position: refs/heads/master@{#41545}

TBR=yangguo@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:665398

Review-Url: https://codereview.chromium.org/2588973003
Cr-Commit-Position: refs/heads/master@{#41830}

src/profiler/profile-generator-inl.h

@@ -27,13 +27,7 @@ CodeEntry::CodeEntry(CodeEventListener::LogEventsAndTags tag, const char* name,
       deopt_reason_(kNoDeoptReason),
       deopt_id_(kNoDeoptimizationId),
       line_info_(line_info),
-      instruction_start_(instruction_start) {
-// TODO(alph): Extra check to help catch crbug.com/665398
-// Remove before 5.8 branch
-#if V8_MAJOR_VERSION == 5 && V8_MINOR_VERSION == 7
-  CHECK(name);
-#endif
-}
+      instruction_start_(instruction_start) {}
 
 ProfileNode::ProfileNode(ProfileTree* tree, CodeEntry* entry,
                          ProfileNode* parent)

src/profiler/profile-generator.cc

@@ -424,11 +424,6 @@ namespace {
 void BuildNodeValue(const ProfileNode* node, TracedValue* value) {
   const CodeEntry* entry = node->entry();
   value->BeginDictionary("callFrame");
-// TODO(alph): Extra check to help catch crbug.com/665398
-// Remove before 5.8 branch
-#if V8_MAJOR_VERSION == 5 && V8_MINOR_VERSION == 7
-  CHECK(entry->name());
-#endif
   value->SetString("functionName", entry->name());
   if (*entry->resource_name()) {
     value->SetString("url", entry->resource_name());