Implement viewporting for the out of process PDF plugin.

chrome/browser/resources/component_extension_resources.grd

Index: chrome/browser/resources/component_extension_resources.grd
diff --git a/chrome/browser/resources/component_extension_resources.grd b/chrome/browser/resources/component_extension_resources.grd
index 27b23d6de51b8e88b531594fef3fac5b14ab18fb..1c53db999c7d9707b40339ccf278a5f1546ffb72 100644
--- a/chrome/browser/resources/component_extension_resources.grd
+++ b/chrome/browser/resources/component_extension_resources.grd
@@ -215,7 +215,8 @@
         <include name="IDR_PDF_INDEX_HTML" file="pdf/index.html" allowexternalscript="true" type="BINDATA" />
         <include name="IDR_PDF_INDEX_JS" file="pdf/index.js" type="BINDATA" />
         <include name="IDR_PDF_BACKGROUND_JS" file="pdf/background.js" type="BINDATA" />
-        <include name="IDR_PDF_JS" file="pdf/pdf.js" type="BINDATA" />
+        <include name="IDR_PDF_JS" file="pdf/pdf.js" type="BINDATA" flattenhtml="true" />
+        <include name="IDR_PDF_VIEWPORT_JS" file="pdf/viewport.js" type="BINDATA" />
         <include name="IDR_PDF_POLYMER_JS" file="pdf/polymer_loader.js" type="BINDATA" flattenhtml="true" />
         <include name="IDR_PDF_BUTTON_LOW_1" file="pdf/html_office/elements/viewer-button/img/lowDPI/button_fit_page.png" type="BINDATA" />
         <include name="IDR_PDF_BUTTON_LOW_2" file="pdf/html_office/elements/viewer-button/img/lowDPI/button_fit_width.png" type="BINDATA" />