PrintPreview: Send the expected pages count value to Web UI along with preview data.

To display initial page range text, we need expected pages count value. Therefore, I added a |expected_pages_count| field to ViewHostMsg_DidPreviewDocument_Params structure.

BUG=none
TEST=Enable print preview on mac. In the preview tab after loading the preview data an initial page range text is displayed.

Review URL: http://codereview.chromium.org/6542002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@75599 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 8 insertions, 1 deletions

diff --git a/chrome/browser/resources/print_preview.js b/chrome/browser/resources/print_preview.js
index 6c3aee2..7dfc1ab 100644
--- a/chrome/browser/resources/print_preview.js
+++ b/chrome/browser/resources/print_preview.js
@@ -4,6 +4,7 @@
 
 var localStrings = new LocalStrings();
 var hasPDFPlugin = true;
+var expectedPageCount = 0;
 
 /**
  * Window onload handler, sets up the page.
@@ -45,10 +46,16 @@ function onPDFLoad() {
 /**
  * Create the PDF plugin or reload the existing one.
  */
-function createPDFPlugin(url) {
+function createPDFPlugin(url, pagesCount) {
   if (!hasPDFPlugin) {
     return;
   }
+  // Set the expected pages count.
+  if (expectedPageCount != pagesCount) {
+    expectedPageCount = pagesCount;
+    // Set the initial page range text.
+    $('pages').value = '1-' + expectedPageCount;
+  }
 
   if ($('pdf-viewer')) {
     $('pdf-viewer').reload();