apps: fix contrast on chrome://apps web store link

This change adjusts the color scheme on chrome://apps:
* The webstore link is now Blue 600 and has no hover effect,
  to make it look like the link it is
* Other text in the footer is #666 so it's readable on the background
* The background is white instead of a near-white translucent gradient
* The logo image is now an image without text, since the text was not
  contrast-y enough

Bug: 957393
Change-Id: I3b3f08554222b23f63d167b54875004a4ddb5c1a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1856541Reviewed-by: Dan Beam <dbeam@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#706032}

chrome/browser/resources/ntp4/new_tab.css

@@ -95,10 +95,9 @@ html[dir='rtl'] #attribution {
 }
 
 #footer {
-  background-image: linear-gradient(
-      rgba(242, 242, 242, 0.9), rgba(222, 222, 222, 0.9));
+  background-color: white;
   bottom: 0;
-  color: #7F7F7F;
+  color: #666;
   font-size: 0.9em;
   font-weight: bold;
   overflow: hidden;
@@ -273,7 +272,7 @@ html[dir='rtl'] #footer.showing-trash-mode #trash.drag-target .lid {
 
 #chrome-web-store-link {
   -webkit-order: 3;
-  color: inherit;
+  color: rgb(26, 115, 232);
   cursor: pointer;
   display: inline-block;
   margin: 0;
@@ -291,10 +290,6 @@ html[dir='rtl'] #footer.showing-trash-mode #trash.drag-target .lid {
   padding-inline-start: 15px;
 }
 
-#chrome-web-store-link:hover {
-  color: #666;
-}
-
 html[dir='rtl'] #chrome-web-store-title {
   background-position-x: left;
 }

chrome/browser/resources/ntp4/new_tab.html

@@ -80,7 +80,7 @@ document.write('<link id="themecss" rel="stylesheet" ' +
     <div id="footer-border"></div>
     <div id="footer-content">
       <div id="logo-img">
-        <img alt="" src="chrome://theme/IDR_PRODUCT_LOGO">
+        <img alt="" src="chrome://theme/IDR_PRODUCT_LOGO_32">
       </div>
 
       <ul id="dot-list">