Improved Pinch-Zoom for PDF.

ui/webui/resources/webui_resources.grd

Index: ui/webui/resources/webui_resources.grd
diff --git a/ui/webui/resources/webui_resources.grd b/ui/webui/resources/webui_resources.grd
index 16c90e21cd6db8775249ad16b2c9e78196891569..781a7d8b5549b97eae36e5650e8b09cd9a69ce04 100644
--- a/ui/webui/resources/webui_resources.grd
+++ b/ui/webui/resources/webui_resources.grd
@@ -16,6 +16,7 @@ without changes to the corresponding grd file. -->
       <include name="IDR_WEBUI_I18N_TEMPLATE_JS" file="js/i18n_template.js" flattenhtml="true" type="BINDATA" />
       <include name="IDR_WEBUI_JSTEMPLATE_JS" file="js/jstemplate_compiled.js" flattenhtml="true" type="BINDATA" />
       <include name="IDR_WEBUI_ANALYTICS_JS" file="js/analytics.js" flattenhtml="true" type="BINDATA" />
+      <include name="IDR_WEBUI_HAMMER_JS" file="js/hammer.js" flattenhtml="true" type="BINDATA" />

[Avi (use Gerrit), 2016/10/27 14:55:26]

Is there some kind of "if pdf enabled" flag appropriate to use here so that we
don't ship the js if it's not needed?

[Kevin McNee - google account, 2016/10/27 16:00:34]

Oddly enough, I did find an enable_pdf flag, but the pdf viewer actually uses
enable_plugins for all of its resources. The viewer fails to load when I tried
using enable_pdf with hammer, so I'll just use what the viewer does.

[Kevin McNee - google account, 2016/10/27 21:40:31]

Done.

       <!-- Roboto Font. Roboto-Regular and Roboto-Light is already available on
            Android, and Roboto-Medium is not used on Android. All 6 weights of
            Roboto are available on Chrome OS.-->