ntp: remove default thumbnail for most visited (broken camera)

BUG=92421
TEST=none

Review URL: http://codereview.chromium.org/8817010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@113333 0039d316-1c4b-4281-b951-d872f2087c98

chrome/app/theme/theme_resources.grd

@@ -57,7 +57,6 @@
       <if expr="not pp_ifdef('_google_chrome')">
         <include name="IDR_CUSTOM_PRODUCT_LOGO" file="chromium/product_logo.png" type="BINDATA" />
       </if>
-      <include name="IDR_DEFAULT_THUMBNAIL" file="default_thumbnail.png" type="BINDATA" />
       <include name="IDR_DOCK_HIGH" file="dock_tab_high.png" type="BINDATA" />
       <include name="IDR_DOCK_MAX" file="dock_tab_max.png" type="BINDATA" />
       <include name="IDR_DOCK_WIDE" file="dock_tab_wide.png" type="BINDATA" />

chrome/browser/resources/ntp4/most_visited_page.css

@@ -95,6 +95,8 @@ html[dir=rtl] .most-visited .close-button {
 
 .thumbnail {
   background: no-repeat;
+  /* This shows for missing thumbnails. */
+  background-color: #eee;
   background-size: 100%;
   border-radius: 3px;
   /* These max dimensions are not necessary, as the sizing logic in the .js

chrome/browser/resources/ntp4/new_tab_theme.css

@@ -90,12 +90,6 @@ body {
   background-color: $6;  /* COLOR_NTP_HEADER */
 }
 
-.edit-bar {
-  background-image: -webkit-linear-gradient(
-                        $7,  /* COLOR_HEADER_GRADIENT_LIGHT */
-                        $6);  /* COLOR_NTP_HEADER */
-}
-
 .thumbnail-wrapper {
   /* This shows through at the (rounded) thumbnail's corners. */
   background-color: $11;  /* COLOR_NTP_SECTION_BORDER */

chrome/browser/ui/webui/ntp/thumbnail_source.cc

@@ -46,11 +46,5 @@ MessageLoop* ThumbnailSource::MessageLoopForRequestPath(
 }
 
 void ThumbnailSource::SendDefaultThumbnail(int request_id) {
-  // Use placeholder thumbnail.
-  if (!default_thumbnail_.get()) {
-    default_thumbnail_ =
-        ResourceBundle::GetSharedInstance().LoadDataResourceBytes(
-            IDR_DEFAULT_THUMBNAIL);
-  }
   SendResponse(request_id, default_thumbnail_);
 }