Remove legacy PDF JSON interface.

chrome/browser/resources/chromeos/chromevox/manifest.json.jinja2

Index: chrome/browser/resources/chromeos/chromevox/manifest.json.jinja2
diff --git a/chrome/browser/resources/chromeos/chromevox/manifest.json.jinja2 b/chrome/browser/resources/chromeos/chromevox/manifest.json.jinja2
index c59ff891460c744a2eedc8aaec749106730e0e53..72efb897a98aacf2c334332dd52789f079485bf2 100644
--- a/chrome/browser/resources/chromeos/chromevox/manifest.json.jinja2
+++ b/chrome/browser/resources/chromeos/chromevox/manifest.json.jinja2
@@ -34,7 +34,8 @@
           "chrome-extension://*",
           "chrome://*",
           "https://accounts.google.com/embedded/setup/chromeos*",
-          "https://talkgadget.google.com/hangouts*"
+          "https://talkgadget.google.com/hangouts*",
+          "*.pdf"

[David Tseng, 2016/06/28 19:53:30]

Have you tested this with an iframe src'ed to a pdf? I don't think we handle
that case.

[dmazzoni, 2016/06/29 20:50:21]

Good catch. I changed the whitelisting rules so that it checks the current
root for compat whitelisting, not just the top level root. It's obviously not
perfect since Classic won't automatically move focus into the plug-in, but
if you Tab into it, it switches to Compat now.

       ],
       "all_frames": true,
       "js": [