Turn libplatform into a component

include/libplatform/v8-tracing.h

Index: include/libplatform/v8-tracing.h
diff --git a/include/libplatform/v8-tracing.h b/include/libplatform/v8-tracing.h
index 7646ea5489664300ec7ad64ea1dbce6451c15424..4eb29219ea42031cfc0170c6434e2c56db284464 100644
--- a/include/libplatform/v8-tracing.h
+++ b/include/libplatform/v8-tracing.h
@@ -9,13 +9,15 @@
 #include <memory>
 #include <vector>
 
+#include "libplatform/libplatform-export.h"
+
 namespace v8 {
 namespace platform {
 namespace tracing {
 
 const int kTraceMaxNumArgs = 2;
 
-class TraceObject {
+class V8_PLATFORM_EXPORT TraceObject {
  public:
   union ArgValue {
     bool as_bool;
@@ -87,7 +89,7 @@ class TraceObject {
   void operator=(const TraceObject&) = delete;
 };
 
-class TraceWriter {
+class V8_PLATFORM_EXPORT TraceWriter {
  public:
   TraceWriter() {}
   virtual ~TraceWriter() {}
@@ -102,7 +104,7 @@ class TraceWriter {
   void operator=(const TraceWriter&) = delete;
 };
 
-class TraceBufferChunk {
+class V8_PLATFORM_EXPORT TraceBufferChunk {
  public:
   explicit TraceBufferChunk(uint32_t seq);
 
@@ -126,7 +128,7 @@ class TraceBufferChunk {
   void operator=(const TraceBufferChunk&) = delete;
 };
 
-class TraceBuffer {
+class V8_PLATFORM_EXPORT TraceBuffer {
  public:
   TraceBuffer() {}
   virtual ~TraceBuffer() {}
@@ -162,7 +164,7 @@ enum TraceRecordMode {
   ECHO_TO_CONSOLE,
 };
 
-class TraceConfig {
+class V8_PLATFORM_EXPORT TraceConfig {
  public:
   typedef std::vector<std::string> StringList;
 
@@ -200,7 +202,7 @@ class TraceConfig {
   void operator=(const TraceConfig&) = delete;
 };
 
-class TracingController {
+class V8_PLATFORM_EXPORT TracingController {
  public:
   enum Mode { DISABLED = 0, RECORDING_MODE };