Bug 749618 - Use a default icon for webapps without one. r=mfinkle

mobile/android/chrome/content/aboutApps.js

@@ -44,7 +44,7 @@ function onLoad(aEvent) {
   AppsUI.shortcut = contextmenus.add(gStrings.GetStringFromName("appsContext.shortcut"), contextmenus.SelectorContext("div[mozApp]"),
     function(aTarget) {
       let manifest = aTarget.manifest;
-      gChromeWin.WebappsUI.createShortcut(manifest.name, manifest.fullLaunchPath(), manifest.iconURLForSize("64"), "webapp");
+      gChromeWin.WebappsUI.createShortcut(manifest.name, manifest.fullLaunchPath(), gChromeWin.WebappsUI.getBiggestIcon(manifest.icons), "webapp");
     });
   AppsUI.uninstall = contextmenus.add(gStrings.GetStringFromName("appsContext.uninstall"), contextmenus.SelectorContext("div[mozApp]"),
     function(aTarget) {
@@ -97,7 +97,7 @@ function addApplication(aApp) {
   container.setAttribute("title", manifest.name);
 
   let img = document.createElement("img");
-  img.src = manifest.iconURLForSize("64");
+  img.src = gChromeWin.WebappsUI.getBiggestIcon(manifest.icons);
   img.setAttribute("title", manifest.name);
 
   let title = document.createElement("div");

mobile/android/chrome/content/browser.js

@@ -5704,7 +5704,7 @@ var WebappsUI = {
 
           // Add a homescreen shortcut -- we can't use createShortcut, since we need to pass
           // a unique ID for Android webapp allocation
-          this.makeBase64Icon(manifest.iconURLForSize("64"),
+          this.makeBase64Icon(this.getBiggestIcon(manifest.icons),
                               function(icon) {
                                 sendMessageToJava({
                                   gecko: {
@@ -5741,6 +5741,17 @@ var WebappsUI = {
     }
   },
 
+  getBiggestIcon: function getBiggestIcon(aIcons) {
+    if (!aIcons)
+      return "chrome://browser/skin/images/default-app-icon.png";
+  
+    let iconSizes = Object.keys(aIcons);
+    if (iconSizes.length == 0)
+      return "chrome://browser/skin/images/default-app-icon.png";
+    iconSizes.sort(function(a, b) a - b);
+    return aIcons[iconSizes.pop()];
+  }
+
   doInstall: function doInstall(aData) {
     let manifest = new DOMApplicationManifest(aData.app.manifest, aData.app.origin);
     let name = manifest.name ? manifest.name : manifest.fullLaunchPath();

mobile/android/themes/core/jar.mn

@@ -32,6 +32,7 @@ chrome.jar:
   skin/images/checkbox_unchecked.png          (images/checkbox_unchecked.png)
   skin/images/checkbox_unchecked_disabled.png (images/checkbox_unchecked_disabled.png)
   skin/images/checkbox_unchecked_pressed.png  (images/checkbox_unchecked_pressed.png)
+  skin/images/default-app-icon.png          (images/default-app-icon.png)
   skin/images/dropmarker.svg                (images/dropmarker.svg)
   skin/images/errorpage-warning.png         (images/errorpage-warning.png)
   skin/images/errorpage-warning.png         (images/errorpage-warning.png)