WebLayer: Add some trace events around Java callbacks

This will help us diagnose any client related performance issues from
traces.

Change-Id: Iafe9ac796aca317d8eaee9a9bf10890ba719a1df
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1900993
Auto-Submit: Alex Clarke <alexclarke@chromium.org>
Commit-Queue: Eric Seckler <eseckler@chromium.org>
Reviewed-by: Eric Seckler <eseckler@chromium.org>
Reviewed-by: Tobias Sargeant <tobiasjs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715266}

base/trace_event/builtin_categories.h

@@ -143,6 +143,7 @@
   X("vk")                                                                \
   X("wayland")                                                           \
   X("webaudio")                                                          \
+  X("weblayer")                                                          \
   X("WebCore")                                                           \
   X("webrtc")                                                            \
   X("xr")                                                                \

weblayer/browser/content_view_render_view.cc

@@ -115,6 +115,7 @@ void ContentViewRenderView::UpdateLayerTreeHost() {
 
 void ContentViewRenderView::DidSwapFrame(int pending_frames) {
   JNIEnv* env = base::android::AttachCurrentThread();
+  TRACE_EVENT0("weblayer", "Java_ContentViewRenderView_didSwapFrame");
   if (Java_ContentViewRenderView_didSwapFrame(env, java_obj_)) {
     compositor_->SetNeedsRedraw();
   }

weblayer/browser/download_callback_proxy.cc

@@ -39,6 +39,7 @@ void DownloadCallbackProxy::DownloadRequested(
       ConvertUTF8ToJavaString(env, content_disposition));
   ScopedJavaLocalRef<jstring> jstring_mime_type(
       ConvertUTF8ToJavaString(env, mime_type));
+  TRACE_EVENT0("weblayer", "Java_DownloadCallbackProxy_downloadRequested");
   Java_DownloadCallbackProxy_downloadRequested(
       env, java_delegate_, jstring_url, jstring_user_agent,
       jstring_content_disposition, jstring_mime_type, content_length);

weblayer/browser/fullscreen_callback_proxy.cc

@@ -28,11 +28,13 @@ FullscreenCallbackProxy::~FullscreenCallbackProxy() {
 
 void FullscreenCallbackProxy::EnterFullscreen(base::OnceClosure exit_closure) {
   exit_fullscreen_closure_ = std::move(exit_closure);
+  TRACE_EVENT0("weblayer", "Java_FullscreenCallbackProxy_enterFullscreen");
   Java_FullscreenCallbackProxy_enterFullscreen(AttachCurrentThread(),
                                                java_delegate_);
 }
 
 void FullscreenCallbackProxy::ExitFullscreen() {
+  TRACE_EVENT0("weblayer", "Java_FullscreenCallbackProxy_exitFullscreen");
   Java_FullscreenCallbackProxy_exitFullscreen(AttachCurrentThread(),
                                               java_delegate_);
 }

weblayer/browser/navigation_controller_impl.cc

@@ -14,6 +14,7 @@
 
 #if defined(OS_ANDROID)
 #include "base/android/jni_string.h"
+#include "base/trace_event/trace_event.h"
 #include "weblayer/browser/java/jni/NavigationControllerImpl_jni.h"
 #endif
 
@@ -121,8 +122,13 @@ void NavigationControllerImpl::DidStartNavigation(
 #if defined(OS_ANDROID)
   if (java_controller_) {
     JNIEnv* env = AttachCurrentThread();
+    {
+      TRACE_EVENT0("weblayer",
+                   "Java_NavigationControllerImpl_createNavigation");
       Java_NavigationControllerImpl_createNavigation(
           env, java_controller_, reinterpret_cast<jlong>(navigation));
+    }
+    TRACE_EVENT0("weblayer", "Java_NavigationControllerImpl_navigationStarted");
     Java_NavigationControllerImpl_navigationStarted(
         env, java_controller_, navigation->java_navigation());
   }
@@ -140,6 +146,8 @@ void NavigationControllerImpl::DidRedirectNavigation(
   auto* navigation = navigation_map_[navigation_handle].get();
 #if defined(OS_ANDROID)
   if (java_controller_) {
+    TRACE_EVENT0("weblayer",
+                 "Java_NavigationControllerImpl_navigationRedirected");
     Java_NavigationControllerImpl_navigationRedirected(
         AttachCurrentThread(), java_controller_, navigation->java_navigation());
   }
@@ -157,6 +165,8 @@ void NavigationControllerImpl::ReadyToCommitNavigation(
   auto* navigation = navigation_map_[navigation_handle].get();
 #if defined(OS_ANDROID)
   if (java_controller_) {
+    TRACE_EVENT0("weblayer",
+                 "Java_NavigationControllerImpl_readyToCommitNavigation");
     Java_NavigationControllerImpl_readyToCommitNavigation(
         AttachCurrentThread(), java_controller_, navigation->java_navigation());
   }
@@ -176,6 +186,8 @@ void NavigationControllerImpl::DidFinishNavigation(
       !navigation_handle->IsErrorPage()) {
 #if defined(OS_ANDROID)
     if (java_controller_) {
+      TRACE_EVENT0("weblayer",
+                   "Java_NavigationControllerImpl_navigationCompleted");
       Java_NavigationControllerImpl_navigationCompleted(
           AttachCurrentThread(), java_controller_,
           navigation->java_navigation());
@@ -186,6 +198,8 @@ void NavigationControllerImpl::DidFinishNavigation(
   } else {
 #if defined(OS_ANDROID)
     if (java_controller_) {
+      TRACE_EVENT0("weblayer",
+                   "Java_NavigationControllerImpl_navigationFailed");
       Java_NavigationControllerImpl_navigationFailed(
           AttachCurrentThread(), java_controller_,
           navigation->java_navigation());
@@ -209,6 +223,8 @@ void NavigationControllerImpl::DidStopLoading() {
 void NavigationControllerImpl::LoadProgressChanged(double progress) {
 #if defined(OS_ANDROID)
   if (java_controller_) {
+    TRACE_EVENT0("weblayer",
+                 "Java_NavigationControllerImpl_loadProgressChanged");
     Java_NavigationControllerImpl_loadProgressChanged(
         AttachCurrentThread(), java_controller_, progress);
   }
@@ -219,6 +235,8 @@ void NavigationControllerImpl::LoadProgressChanged(double progress) {
 
 void NavigationControllerImpl::DidFirstVisuallyNonEmptyPaint() {
 #if defined(OS_ANDROID)
+  TRACE_EVENT0("weblayer",
+               "Java_NavigationControllerImpl_onFirstContentfulPaint");
   Java_NavigationControllerImpl_onFirstContentfulPaint(AttachCurrentThread(),
                                                        java_controller_);
 #endif
@@ -230,6 +248,7 @@ void NavigationControllerImpl::DidFirstVisuallyNonEmptyPaint() {
 void NavigationControllerImpl::NotifyLoadStateChanged() {
 #if defined(OS_ANDROID)
   if (java_controller_) {
+    TRACE_EVENT0("weblayer", "Java_NavigationControllerImpl_loadStateChanged");
     Java_NavigationControllerImpl_loadStateChanged(
         AttachCurrentThread(), java_controller_, web_contents()->IsLoading(),
         web_contents()->IsLoadingToDifferentDocument());

weblayer/browser/new_tab_callback_proxy.cc

@@ -28,6 +28,7 @@ NewTabCallbackProxy::~NewTabCallbackProxy() {
 void NewTabCallbackProxy::OnNewTab(std::unique_ptr<Tab> tab, NewTabType type) {
   JNIEnv* env = AttachCurrentThread();
   // The Java side takes ownership of Tab.
+  TRACE_EVENT0("weblayer", "Java_NewTabCallbackProxy_onNewTab");
   Java_NewTabCallbackProxy_onNewTab(env, java_impl_,
                                     reinterpret_cast<jlong>(tab.release()),
                                     static_cast<int>(type));

weblayer/browser/tab_callback_proxy.cc

@@ -28,10 +28,12 @@ void TabCallbackProxy::DisplayedUrlChanged(const GURL& url) {
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jstring> jstring_url(
       ConvertUTF8ToJavaString(env, url.spec()));
+  TRACE_EVENT0("weblayer", "Java_TabCallbackProxy_visibleUrlChanged");
   Java_TabCallbackProxy_visibleUrlChanged(env, java_observer_, jstring_url);
 }
 
 void TabCallbackProxy::OnRenderProcessGone() {
+  TRACE_EVENT0("weblayer", "Java_TabCallbackProxy_onRenderProcessGone");
   Java_TabCallbackProxy_onRenderProcessGone(AttachCurrentThread(),
                                             java_observer_);
 }

weblayer/browser/tab_impl.cc

@@ -31,6 +31,7 @@
 #include "base/android/callback_android.h"
 #include "base/android/jni_string.h"
 #include "base/json/json_writer.h"
+#include "base/trace_event/trace_event.h"
 #include "components/embedder_support/android/delegate/color_chooser_android.h"
 #include "weblayer/browser/java/jni/TabImpl_jni.h"
 #include "weblayer/browser/top_controls_container_view.h"
@@ -291,6 +292,7 @@ int TabImpl::GetTopControlsHeight() {
 bool TabImpl::DoBrowserControlsShrinkRendererSize(
     const content::WebContents* web_contents) {
 #if defined(OS_ANDROID)
+  TRACE_EVENT0("weblayer", "Java_TabImpl_doBrowserControlsShrinkRendererSize");
   return Java_TabImpl_doBrowserControlsShrinkRendererSize(
       base::android::AttachCurrentThread(), java_impl_);
 #else

weblayer/browser/top_controls_container_view.cc

@@ -110,6 +110,8 @@ void TopControlsContainerView::SetWebContents(
 void TopControlsContainerView::DidToggleFullscreenModeForTab(
     bool entered_fullscreen,
     bool will_cause_resize) {
+  TRACE_EVENT0("weblayer",
+               "Java_TopControlsContainerView_didToggleFullscreenModeForTab");
   Java_TopControlsContainerView_didToggleFullscreenModeForTab(
       AttachCurrentThread(), java_top_controls_container_view_,
       entered_fullscreen);