Add startup trace events

sky/shell/platform/ios/sky_app_delegate.mm

@@ -4,11 +4,13 @@
 
 #import "sky_app_delegate.h"
 #import "sky_view_controller.h"
+#import "base/trace_event/trace_event.h"
 
 @implementation SkyAppDelegate
 
 - (BOOL)application:(UIApplication*)application
     didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
+  TRACE_EVENT0("flutter", "applicationDidFinishLaunchingWithOptions");
 
   CGRect frame = [UIScreen mainScreen].bounds;
   UIWindow* window = [[UIWindow alloc] initWithFrame:frame];

sky/shell/platform/ios/sky_surface.mm

@@ -9,6 +9,7 @@
 #import <OpenGLES/EAGLDrawable.h>
 
 #include "base/time/time.h"
+#include "base/trace_event/trace_event.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "sky/services/engine/input_event.mojom.h"
 #include "sky/services/pointer/pointer.mojom.h"
@@ -100,6 +101,7 @@ static std::string TracesBasePath() {
 }
 
 - (instancetype)initWithShellView:(sky::shell::ShellView*)shellView {
+  TRACE_EVENT0("flutter", "initWithShellView");
   self = [super init];
   if (self) {
     base::FilePath tracesPath =
@@ -119,6 +121,7 @@ static std::string TracesBasePath() {
 }
 
 - (void)layoutSubviews {
+  TRACE_EVENT0("flutter", "layoutSubviews");
   [super layoutSubviews];
 
   [self configureLayerDefaults];
@@ -166,6 +169,7 @@ static std::string TracesBasePath() {
 }
 
 - (void)notifySurfaceCreation {
+  TRACE_EVENT0("flutter", "notifySurfaceCreation");
   self.platformView->SurfaceCreated(self.acceleratedWidget);
 }
 
@@ -185,6 +189,7 @@ static std::string TracesBasePath() {
 }
 
 - (void)connectToEngineAndLoad {
+  TRACE_EVENT0("flutter", "connectToEngineAndLoad");
   self.platformView->ConnectToEngine(mojo::GetProxy(&_sky_engine));
 
   mojo::ServiceProviderPtr service_provider;
@@ -198,6 +203,7 @@ static std::string TracesBasePath() {
 }
 
 - (void)notifySurfaceDestruction {
+  TRACE_EVENT0("flutter", "notifySurfaceDestruction");
   self.platformView->SurfaceDestroyed();
 }
 

sky/shell/shell.cc

@@ -13,9 +13,10 @@
 #include "base/memory/discardable_memory.h"
 #include "base/memory/discardable_memory_allocator.h"
 #include "base/single_thread_task_runner.h"
+#include "base/trace_event/trace_event.h"
 #include "mojo/message_pump/message_pump_mojo.h"
-#include "sky/shell/ui/engine.h"
 #include "sky/shell/switches.h"
+#include "sky/shell/ui/engine.h"
 
 namespace sky {
 namespace shell {
@@ -73,6 +74,7 @@ Shell::~Shell() {
 }
 
 void Shell::InitStandalone() {
+  TRACE_EVENT0("flutter", "Shell::InitStandalone");
   CHECK(base::i18n::InitializeICU());
 
   base::CommandLine& command_line = *base::CommandLine::ForCurrentProcess();

sky/shell/ui/engine.cc

@@ -31,9 +31,11 @@ namespace {
 const char kSnapshotKey[] = "snapshot_blob.bin";
 
 void Ignored(bool) {
+  TRACE_EVENT_ASYNC_END0("flutter", "AssetUnpackerJobFetch", 1);
 }
 
 mojo::ScopedDataPipeConsumerHandle Fetch(const base::FilePath& path) {
+  TRACE_EVENT_ASYNC_BEGIN0("flutter", "AssetUnpackerJobFetch", 1);
   mojo::DataPipe pipe;
   auto runner = base::WorkerPool::GetTaskRunner(true);
   mojo::common::CopyFromFile(base::FilePath(path), pipe.producer_handle.Pass(),
@@ -123,9 +125,11 @@ void Engine::SetServices(ServicesDataPtr services) {
 #if defined(OS_ANDROID) || defined(OS_IOS)
   vsync::VSyncProviderPtr vsync_provider;
   if (services_->shell) {
-    mojo::ConnectToService(services_->shell.get(), "mojo:vsync", &vsync_provider);
+    mojo::ConnectToService(services_->shell.get(), "mojo:vsync",
+                           &vsync_provider);
   } else {
-    mojo::ConnectToService(services_->services_provided_by_embedder.get(), &vsync_provider);
+    mojo::ConnectToService(services_->services_provided_by_embedder.get(),
+                           &vsync_provider);
   }
   animator_->set_vsync_provider(vsync_provider.Pass());
 #endif
@@ -159,6 +163,7 @@ void Engine::OnPointerPacket(pointer::PointerPacketPtr packet) {
 }
 
 void Engine::RunFromLibrary(const std::string& name) {
+  TRACE_EVENT0("flutter", "Engine::RunFromLibrary");
   sky_view_ = blink::SkyView::Create(this);
   sky_view_->CreateView(blink::WebString::fromUTF8(name));
   sky_view_->RunFromLibrary(blink::WebString::fromUTF8(name),
@@ -172,7 +177,6 @@ void Engine::RunFromSnapshotStream(
     const std::string& name,
     mojo::ScopedDataPipeConsumerHandle snapshot) {
   TRACE_EVENT0("flutter", "Engine::RunFromSnapshotStream");
-
   sky_view_ = blink::SkyView::Create(this);
   sky_view_->CreateView(blink::WebString::fromUTF8(name));
   sky_view_->RunFromSnapshot(blink::WebString::fromUTF8(name), snapshot.Pass());
@@ -182,6 +186,7 @@ void Engine::RunFromSnapshotStream(
 }
 
 void Engine::RunFromPrecompiledSnapshot(const mojo::String& bundle_path) {
+  TRACE_EVENT0("flutter", "Engine::RunFromPrecompiledSnapshot");
   AssetUnpackerJob* unpacker = new AssetUnpackerJob(
       mojo::GetProxy(&root_bundle_), base::WorkerPool::GetTaskRunner(true));
   std::string path_str = bundle_path;
@@ -197,6 +202,7 @@ void Engine::RunFromPrecompiledSnapshot(const mojo::String& bundle_path) {
 
 void Engine::RunFromFile(const mojo::String& main,
                          const mojo::String& package_root) {
+  TRACE_EVENT0("flutter", "Engine::RunFromFile");
   std::string package_root_str = package_root;
   dart_library_provider_.reset(
       new DartLibraryProviderFiles(base::FilePath(package_root_str)));
@@ -205,7 +211,6 @@ void Engine::RunFromFile(const mojo::String& main,
 
 void Engine::RunFromBundle(const mojo::String& path) {
   TRACE_EVENT0("flutter", "Engine::RunFromBundle");
-
   AssetUnpackerJob* unpacker = new AssetUnpackerJob(
       mojo::GetProxy(&root_bundle_), base::WorkerPool::GetTaskRunner(true));
   std::string path_str = path;
@@ -217,6 +222,7 @@ void Engine::RunFromBundle(const mojo::String& path) {
 
 void Engine::RunFromAssetBundle(const mojo::String& url,
                                 mojo::asset_bundle::AssetBundlePtr bundle) {
+  TRACE_EVENT0("flutter", "Engine::RunFromAssetBundle");
   std::string url_str = url;
   root_bundle_ = bundle.Pass();
   root_bundle_->GetAsStream(kSnapshotKey,