Compile print_preview, part 3: reduce down to 185 errors

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 e7cc3f4a099c5fc44337bd64a28036845c9087ce..6eb199fa9de3b36b1a0c91e9ec2762bc2bab8c33 100644
--- a/chrome/browser/resources/print_preview/print_preview.js
+++ b/chrome/browser/resources/print_preview/print_preview.js
@@ -269,23 +269,6 @@ cr.define('print_preview', function() {
   };
 
   /**
-   * States of the print preview.
-   * @enum {string}
-   * @private
-   */
-  PrintPreview.UiState_ = {
-    INITIALIZING: 'initializing',
-    READY: 'ready',
-    OPENING_PDF_PREVIEW: 'opening-pdf-preview',
-    OPENING_CLOUD_PRINT_DIALOG: 'opening-cloud-print-dialog',
-    OPENING_NATIVE_PRINT_DIALOG: 'opening-native-print-dialog',
-    PRINTING: 'printing',
-    FILE_SELECTION: 'file-selection',
-    CLOSING: 'closing',
-    ERROR: 'error'
-  };
-
-  /**
    * What can happen when print preview tries to print.
    * @enum {string}
    * @private
@@ -850,6 +833,9 @@ cr.define('print_preview', function() {
      * to the preview area.
      * @param {KeyboardEvent} e The keyboard event.
      * @private
+     * @suppress {uselessCode}
+     * Current compiler preprocessor leaves all the code inside all the <if>s,
+     * so the compiler claims that code after first return is unreachable.
      */
     onKeyDown_: function(e) {
       // Escape key closes the dialog.
@@ -930,7 +916,7 @@ cr.define('print_preview', function() {
      */
     onAdvancedOptionsButtonActivated_: function() {
       this.advancedSettings_.showForDestination(
-          this.destinationStore_.selectedDestination);
+          assert(this.destinationStore_.selectedDestination));
     },
 
     /**
@@ -991,6 +977,8 @@ cr.define('print_preview', function() {
      * @private
      */
     onManipulateSettingsForTest_: function(event) {
+      event.settings =
+          /** @type {print_preview.PreviewSettings} */(event.settings);
       if ('selectSaveAsPdfDestination' in event.settings) {
         this.saveAsPdfForTest_();  // No parameters.
       } else if ('layoutSettings' in event.settings) {
@@ -1130,7 +1118,7 @@ cr.define('print_preview', function() {
       if (!cr.isWindows)
         return true;
       var selectedDest = this.destinationStore_.selectedDestination;
-      return selectedDest &&
+      return !!selectedDest &&
              selectedDest.origin == print_preview.Destination.Origin.LOCAL &&
              selectedDest.id !=
                  print_preview.Destination.GooglePromotedId.SAVE_AS_PDF;
@@ -1160,7 +1148,7 @@ cr.define('print_preview', function() {
       var selectedDest = this.destinationStore_.selectedDestination;
       setIsVisible(
           getRequiredElement('cloud-print-dialog-link'),
-          selectedDest && !cr.isChromeOS && !selectedDest.isLocal);
+          !!selectedDest && !cr.isChromeOS && !selectedDest.isLocal);
       setIsVisible(
           getRequiredElement('system-dialog-link'),
           this.shouldShowSystemDialogLink_());
@@ -1180,8 +1168,8 @@ cr.define('print_preview', function() {
           this.cloudPrintInterface_ &&
           this.userInfo_.activeUser &&
           !this.appState_.isGcpPromoDismissed &&
-          !this.destinationStore_.isLocalDestinationsSearchInProgress &&
-          !this.destinationStore_.isCloudDestinationsSearchInProgress &&
+          !this.destinationStore_.isLocalDestinationSearchInProgress &&
+          !this.destinationStore_.isCloudDestinationSearchInProgress &&
           this.destinationStore_.hasOnlyDefaultCloudDestinations();
       setIsVisible(this.getChildElement('#no-destinations-promo'),
                    isPromoVisible);
@@ -1224,6 +1212,23 @@ cr.define('print_preview', function() {
   };
 });
 
+/**
+ * States of the print preview.
+ * @enum {string}
+ * @private
+ */
+print_preview.PrintPreview.UiState_ = {
+  INITIALIZING: 'initializing',
+  READY: 'ready',
+  OPENING_PDF_PREVIEW: 'opening-pdf-preview',
+  OPENING_CLOUD_PRINT_DIALOG: 'opening-cloud-print-dialog',
+  OPENING_NATIVE_PRINT_DIALOG: 'opening-native-print-dialog',
+  PRINTING: 'printing',
+  FILE_SELECTION: 'file-selection',
+  CLOSING: 'closing',
+  ERROR: 'error'
+};
+
 // Pull in all other scripts in a single shot.
 <include src="common/overlay.js">
 <include src="common/search_box.js">