Implement tracing interface for v8

src/libplatform/default-platform.cc

Index: src/libplatform/default-platform.cc
diff --git a/src/libplatform/default-platform.cc b/src/libplatform/default-platform.cc
index ddceab54572d12f3a4f5ce6db9ced6675e8f6ed4..c6e9e3a88807a1a312db5fcb05f277fae752bdc5 100644
--- a/src/libplatform/default-platform.cc
+++ b/src/libplatform/default-platform.cc
@@ -168,4 +168,26 @@ double DefaultPlatform::MonotonicallyIncreasingTime() {
   return base::TimeTicks::HighResolutionNow().ToInternalValue() /
          static_cast<double>(base::Time::kMicrosecondsPerSecond);
 }
+
+uint64_t DefaultPlatform::AddTraceEvent(
+    char phase, const uint8_t* categoryEnabledFlag, const char* name,
+    uint64_t id, uint64_t context_id, uint64_t bind_id, int numArgs,
+    const char** argNames, const uint8_t* argTypes, const uint64_t* argValues,
+    unsigned int flags) {
+  return 0;
+}
+
+void DefaultPlatform::UpdateTraceEventDuration(
+    const uint8_t* categoryEnabledFlag, const char* name, uint64_t handle) {}
+
+const uint8_t* DefaultPlatform::GetCategoryGroupEnabled(const char* name) {
+  static uint8_t no = 0;
+  return &no;
+}
+
+const char* DefaultPlatform::GetCategoryGroupName(
+    const uint8_t* categoryEnabledFlag) {
+  static const char* dummy = "dummy";

[noordhuis, 2015/10/07 18:31:54]

`static const char[] dummy = ...`?

[fmeawad, 2015/11/19 02:00:47]

Done.

+  return dummy;
+}
 } }  // namespace v8::platform