[DevTools] Move IO and Tracing to new generator.

third_party/inspector_protocol/lib/DispatcherBase_cpp.template

Index: third_party/inspector_protocol/lib/DispatcherBase_cpp.template
diff --git a/third_party/inspector_protocol/lib/DispatcherBase_cpp.template b/third_party/inspector_protocol/lib/DispatcherBase_cpp.template
index 9095cbc961c7761406eb58c76264cf13e9b1f128..3f9c102758e078d3f10bdd3d7bac577bed7b2156 100644
--- a/third_party/inspector_protocol/lib/DispatcherBase_cpp.template
+++ b/third_party/inspector_protocol/lib/DispatcherBase_cpp.template
@@ -58,9 +58,10 @@ DispatcherBase::WeakPtr::~WeakPtr()
         m_dispatcher->m_weakPtrs.erase(this);
 }
 
-DispatcherBase::Callback::Callback(std::unique_ptr<DispatcherBase::WeakPtr> backendImpl, int callId)
+DispatcherBase::Callback::Callback(std::unique_ptr<DispatcherBase::WeakPtr> backendImpl, int callId, int callbackId)
     : m_backendImpl(std::move(backendImpl))
-    , m_callId(callId) { }
+    , m_callId(callId)
+    , m_callbackId(callbackId) { }
 
 DispatcherBase::Callback::~Callback() = default;
 
@@ -77,14 +78,36 @@ void DispatcherBase::Callback::sendIfActive(std::unique_ptr<protocol::Dictionary
     m_backendImpl = nullptr;
 }
 
+void DispatcherBase::Callback::fallThroughIfActive()
+{
+    if (!m_backendImpl || !m_backendImpl->get())
+        return;
+    m_backendImpl->get()->markFallThrough(m_callbackId);
+    m_backendImpl = nullptr;
+}
+
 DispatcherBase::DispatcherBase(FrontendChannel* frontendChannel)
-    : m_frontendChannel(frontendChannel) { }
+    : m_frontendChannel(frontendChannel)
+    , m_lastCallbackId(0)
+    , m_lastCallbackFallThrough(false) { }
 
 DispatcherBase::~DispatcherBase()
 {
     clearFrontend();
 }
 
+int DispatcherBase::nextCallbackId()
+{
+    m_lastCallbackFallThrough = false;
+    return ++m_lastCallbackId;
+}
+
+void DispatcherBase::markFallThrough(int callbackId)
+{
+    if (callbackId == m_lastCallbackId)
+        m_lastCallbackFallThrough = true;
+}
+
 // static
 bool DispatcherBase::getCommandName(const String& message, String* result)
 {
@@ -171,6 +194,10 @@ std::unique_ptr<DispatcherBase::WeakPtr> DispatcherBase::weakPtr()
 UberDispatcher::UberDispatcher(FrontendChannel* frontendChannel)
     : m_frontendChannel(frontendChannel) { }
 
+UberDispatcher::UberDispatcher(FrontendChannel* frontendChannel, bool fallThroughForNotFound)
+    : m_frontendChannel(frontendChannel)
+    , m_fallThroughForNotFound(fallThroughForNotFound) { }
+
 void UberDispatcher::registerBackend(const String& name, std::unique_ptr<protocol::DispatcherBase> dispatcher)
 {
     m_dispatchers[name] = std::move(dispatcher);
@@ -206,12 +233,16 @@ DispatchResponse::Status UberDispatcher::dispatch(std::unique_ptr<Value> parsedM
 
     size_t dotIndex = method.find(".");
     if (dotIndex == StringUtil::kNotFound) {
+        if (m_fallThroughForNotFound)
+            return DispatchResponse::kFallThrough;
         reportProtocolErrorTo(m_frontendChannel, callId, DispatchResponse::kMethodNotFound, "'" + method + "' wasn't found", nullptr);
         return DispatchResponse::kError;
     }
     String domain = StringUtil::substring(method, 0, dotIndex);
     auto it = m_dispatchers.find(domain);
     if (it == m_dispatchers.end()) {
+        if (m_fallThroughForNotFound)
+            return DispatchResponse::kFallThrough;
         reportProtocolErrorTo(m_frontendChannel, callId, DispatchResponse::kMethodNotFound, "'" + method + "' wasn't found", nullptr);
         return DispatchResponse::kError;
     }