Add EDU login flow: welcome screen icon

Screenshot: http://screen/eqiMqP4ssYd

Bug: 1043108
Change-Id: I04526e314d7666e1b8d5ba71deed50f7cb0f4ba7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2096556Reviewed-by: Kush Sinha <sinhak@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Anastasiia Nikolaienko <anastasiian@chromium.org>
Cr-Commit-Position: refs/heads/master@{#750230}

chrome/browser/resources/chromeos/edu_login/edu_login_welcome.html

-<style include="edu-login-css"></style>
+<style include="edu-login-css">
+  .main-padding {
+    display: flex;
+    flex-direction: column;
+  }
+
+  .image-container {
+    align-items: center;
+    display: flex;
+    flex-grow: 1;
+    justify-content: center;
+    width: 100%;
+  }
+
+  .welcome-image {
+    height: 256px;
+    width: 256px;
+  }
+</style>
 <edu-login-template>
   <span slot="main">
     <div class="main-padding">
@@ -8,6 +26,9 @@
       </if>
       <h1>[[getTitle_()]]</h1>
       <p>[[getBody_()]]</p>
+      <div class="image-container">
+        <img class="welcome-image" src="family_link_logo.svg" alt="">
+      </div>
     </div>
   </span>
   <span slot="buttons">

chrome/browser/ui/webui/signin/inline_login_ui.cc

@@ -96,6 +96,7 @@ content::WebUIDataSource* CreateWebUIDataSource() {
   source->AddResourcePath("googleg.svg",
                           IDR_ACCOUNT_MANAGER_WELCOME_GOOGLE_LOGO_SVG);
 #endif
+  source->AddResourcePath("family_link_logo.svg", IDR_FAMILY_LINK_LOGO_SVG);
 
   source->EnableReplaceI18nInJS();
   AddEduStrings(source);