Update What's new content for Chrome 149

Change-Id: I67691193fa8c98c989f1fadfd050a1aacdb41aee
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/7871080
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Reviewed-by: Alex Rudenko <alexrudenko@chromium.org>
Commit-Queue: Matthias Rohmer <mrohmer@google.com>
(cherry picked from commit 6e72970)

Bug: 516739855
Change-Id: I67691193fa8c98c989f1fadfd050a1aacdb41aee
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/7871081
Reviewed-by: Alex Rudenko <alexrudenko@chromium.org>
Commit-Queue: Matthias Rohmer <mrohmer@google.com>
Reviewed-by: Mathias Bynens <mathias@chromium.org>

Author: matthiasrohmer

front_end/panels/whats_new/ReleaseNoteText.ts

@@ -40,22 +40,22 @@ export function getReleaseNote(): ReleaseNote {
 }
 
 let releaseNote: ReleaseNote = {
-  version: 148,
-  header: 'What\'s new in DevTools 148',
+  version: 149,
+  header: 'What’s new in DevTools 149',
   markdownLinks: [
     {
-      key: 'extension-debugging',
-      link: 'https://developer.chrome.com/blog/new-in-devtools-148/#extension-debugging',
+      key: 'devtools-for-agents',
+      link: 'https://developer.chrome.com/blog/new-in-devtools-149/#devtools-for-agents',
     },
     {
-      key: 'sort-network-requests',
-      link: 'https://developer.chrome.com/blog/new-in-devtools-148/#sort-network-requests',
+      key: 'ai-assistance',
+      link: 'https://developer.chrome.com/blog/new-in-devtools-149/#ai-assistance',
     },
     {
-      key: 'accessibility-tree',
-      link: 'https://developer.chrome.com/blog/new-in-devtools-148/#accessibility-tree',
+      key: 'css-code-completion',
+      link: 'https://developer.chrome.com/blog/new-in-devtools-149/#css-code-completion',
     }
   ],
   videoLinks: [],
-  link: 'https://developer.chrome.com/blog/new-in-devtools-148/',
+  link: 'https://developer.chrome.com/blog/new-in-devtools-149/',
 };

front_end/panels/whats_new/resources/WNDT.md

@@ -1,14 +1,14 @@
-### [Agentic extensions debugging](extension-debugging)
+### [DevTools for agents](devtools-for-agents)
 
-You can now debug extensions through a coding agent using new tools in DevTools for agents,
-available through the MCP server.
+DevTools for agents is now stable at version 1.0, bringing support for third-party developer tools
+provided by the inspected page, WebMCP debugging, and an improved CLI experience.
 
-### [Sort network requests](sort-network-requests)
+### [AI assistance](ai-assistance)
 
-The Network panel introduces a new Request # column, allowing you to sort requests by their
-absolute chronological order of occurrence, independent of priority or duration.
+The AI assistance panel now integrates with Lighthouse data and offers interactive, widget-based agent walkthroughs.
+Supported by an upgrade to Gemini 3 and other optimizations, responses are now more concise and actionable.
 
-### [Accessibility tree](accessibility-tree)
+### [CSS code completion](css-code-completion)
 
-To streamline the Elements panel, the Accessibility tree toggle has moved from the DOM tree
-to the Accessibility tab within the panel.
+The Styles tab in the Elements panel now features enhanced, Gemini-powered code completion.
+Experience smarter, real-time CSS suggestions that adapt dynamically as you type.