Add fontsUpdated event to devtools when init FontFace with byte data.

Notify devtools client on fontUdpated event when initialize CSS font
face with binary data. The current devtools fontUpdated event only
gets called when initialize font face from src url.

third_party/blink/tools/run_web_tests.py -t Release
third_party/blink/web_tests/inspector-protocol/css/
css-fonts-updated-event-with-data-buffer.js

Bug: 1095185
Test: autoninja -C out/Release blink_tests and run python
Change-Id: I8507953e3046c3c21e3bc9ec6e681961fb5a11de
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2247159
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Reviewed-by: Dominik Röttsches <drott@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#784359}

AUTHORS

@@ -582,6 +582,7 @@ Kyung Yeol Kim <chitacan@gmail.com>
 Kyungtae Kim <ktf.kim@samsung.com>
 Kyungyoung Heo <bbvch13531@gmail.com>
 Lalit Chandivade <lalit.chandivade@einfochips.com>
+Lam Lu <lamlu@amazon.com>
 Laszlo Gombos <l.gombos@samsung.com>
 Laszlo Radanyi <bekkra@gmail.com>
 Lauren Yeun Kim <lauren.yeun.kim@gmail.com>

third_party/blink/renderer/core/css/binary_data_font_face_source.cc

@@ -4,6 +4,8 @@
 
 #include "third_party/blink/renderer/core/css/binary_data_font_face_source.h"
 
+#include "third_party/blink/renderer/core/css/css_font_face.h"
+#include "third_party/blink/renderer/core/probe/core_probes.h"
 #include "third_party/blink/renderer/platform/fonts/font_custom_platform_data.h"
 #include "third_party/blink/renderer/platform/fonts/font_description.h"
 #include "third_party/blink/renderer/platform/fonts/simple_font_data.h"
@@ -11,10 +13,20 @@
 
 namespace blink {
 
-BinaryDataFontFaceSource::BinaryDataFontFaceSource(SharedBuffer* data,
+BinaryDataFontFaceSource::BinaryDataFontFaceSource(CSSFontFace* css_font_face,
+                                                   SharedBuffer* data,
                                                    String& ots_parse_message)
     : custom_platform_data_(
-          FontCustomPlatformData::Create(data, ots_parse_message)) {}
+          FontCustomPlatformData::Create(data, ots_parse_message)) {
+  if (!css_font_face || !css_font_face->GetFontFace())
+    return;
+  FontFace* font_face = css_font_face->GetFontFace();
+  ExecutionContext* context = font_face->GetExecutionContext();
+  if (!context)
+    return;
+  probe::FontsUpdated(context, font_face, String(),
+                      custom_platform_data_.get());
+}
 
 BinaryDataFontFaceSource::~BinaryDataFontFaceSource() = default;
 

third_party/blink/renderer/core/css/binary_data_font_face_source.h

@@ -10,11 +10,12 @@
 
 namespace blink {
 
+class CSSFontFace;
 class FontCustomPlatformData;
 
 class BinaryDataFontFaceSource final : public CSSFontFaceSource {
  public:
-  BinaryDataFontFaceSource(SharedBuffer*, String&);
+  BinaryDataFontFaceSource(CSSFontFace*, SharedBuffer*, String&);
   ~BinaryDataFontFaceSource() override;
   bool IsValid() const override;
 

third_party/blink/renderer/core/css/font_face.cc

@@ -773,8 +773,8 @@ void FontFace::InitCSSFontFace(const unsigned char* data, size_t size) {
 
   scoped_refptr<SharedBuffer> buffer = SharedBuffer::Create(data, size);
   BinaryDataFontFaceSource* source =
-      MakeGarbageCollected<BinaryDataFontFaceSource>(buffer.get(),
-                                                     ots_parse_message_);
+      MakeGarbageCollected<BinaryDataFontFaceSource>(
+          css_font_face_, buffer.get(), ots_parse_message_);
   if (source->IsValid()) {
     SetLoadStatus(kLoaded);
   } else {

third_party/blink/renderer/core/inspector/inspector_css_agent.cc

@@ -770,7 +770,7 @@ void InspectorCSSAgent::FontsUpdated(
     const FontCustomPlatformData* fontCustomPlatformData) {
   FlushPendingProtocolNotifications();
 
-  if (!(font && src && fontCustomPlatformData)) {
+  if (!(font && fontCustomPlatformData)) {
     GetFrontend()->fontsUpdated();
     return;
   }

third_party/blink/web_tests/inspector-protocol/css/css-fonts-updated-event-with-data-buffer-expected.txt

+Verifies that CSS.fontsUpdated events are sent as the web font is loaded by font data buffer.
+Ahem
+normal
+normal
+normal
+normal
+U+0-10FFFF
+Ahem
+
+

third_party/blink/web_tests/inspector-protocol/css/css-fonts-updated-event-with-data-buffer.js

+(async function(testRunner) {
+  const {page, session, dp} = await testRunner.startBlank(`Verifies that CSS.fontsUpdated events are sent as the web font is loaded by font data buffer.`);
+  await dp.DOM.enable();
+  await dp.CSS.enable();
+  session.evaluate(`
+    const script = document.createElement('script');
+    script.src = '../../resources/ahem.js';
+    document.head.appendChild(script);
+  `);
+  event = await dp.CSS.onceFontsUpdated(
+                       event => typeof event.params.font !== 'undefined' &&
+                       event.params.font.fontFamily === 'Ahem');
+  const font = event.params.font;
+  testRunner.log(font.fontFamily);         // Ahem
+  testRunner.log(font.fontStyle);          // normal
+  testRunner.log(font.fontVariant);        // normal
+  testRunner.log(font.fontWeight);         // normal
+  testRunner.log(font.fontStretch);        // normal
+  testRunner.log(font.unicodeRange);       // U+0-10FFFF
+  testRunner.log(font.platformFontFamily); // Ahem
+  testRunner.log(font.src);                // Empty
+  testRunner.completeTest();
+});