[JS Changes] Support NumCopies print preset

chrome/browser/resources/print_preview/print_preview.js

Index: chrome/browser/resources/print_preview/print_preview.js
diff --git a/chrome/browser/resources/print_preview/print_preview.js b/chrome/browser/resources/print_preview/print_preview.js
index 673b8d89ef191a18ce356069d2512ed1080f5780..c3ea3fb349509c9fb5fd8abbf40d591fb403d6f6 100644
--- a/chrome/browser/resources/print_preview/print_preview.js
+++ b/chrome/browser/resources/print_preview/print_preview.js
@@ -351,6 +351,10 @@ cr.define('print_preview', function() {
           this.onDisableScaling_.bind(this));

[Aleksey Shlyapnikov, 2014/11/21 22:50:42]

Please remove _all_ obsolete code.

[Nikhil, 2014/11/24 12:57:30]

Done.

       this.tracker.add(
           this.nativeLayer_,
+          print_preview.NativeLayer.EventType.PRINT_PRESET_OPTIONS,
+          this.onPrintPresetOptionsFromDocument_.bind(this));
+      this.tracker.add(
+          this.nativeLayer_,
           print_preview.NativeLayer.EventType.PRIVET_PRINT_FAILED,
           this.onPrivetPrintFailed_.bind(this));
       this.tracker.add(
@@ -989,6 +993,23 @@ cr.define('print_preview', function() {
     },

[Aleksey Shlyapnikov, 2014/11/21 22:50:42]

Please remove _all_ obsolete code.

[Nikhil, 2014/11/24 12:57:30]

Done.

 
     /**
+     * Called when the native layer dispatches a PRINT_PRESET_OPTIONS event. It
+     * updates the print preset options from source document.

[Aleksey Shlyapnikov, 2014/11/21 22:50:42]

Just one sentence:

Updates printing options according to source document presets.

[Nikhil, 2014/11/24 12:57:30]

Done.

+     * @param {event} event Contains options from source document.

[Aleksey Shlyapnikov, 2014/11/21 22:50:42]

event -> Event

[Nikhil, 2014/11/24 12:57:30]

Done.

+     * @private
+     */
+    onPrintPresetOptionsFromDocument_: function(event) {
+      if (event.optionsFromDocument.disableScaling)
+        this.onDisableScaling_();
+
+      if (this.printTicketStore_.copies.isCapabilityAvailable() &&
+          event.optionsFromDocument.copies) {

[Aleksey Shlyapnikov, 2014/11/21 22:50:42]

Let's swap checks and add sanity check:

if (event.optionsFromDocument.copies > 0 &&
    this.printTicketStore_.copies.isCapabilityAvailable()) {

[Nikhil, 2014/11/24 12:57:30]

Done.

+        this.printTicketStore_.copies.updateValue(
+            event.optionsFromDocument.copies);
+      }
+    },
+
+    /**
      * Called when privet printing fails.
      * @param {Event} event Event object representing the failure.
      * @private