Fix a bug where we were forcing pdf intents to stay in Chrome.

chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationHandler.java

Index: chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationHandler.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationHandler.java b/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationHandler.java
index 60c862d45264007d6e1cdfe7bb8b8344b9da82c5..ecb8465aa3c118cf2a401d5a44f4daf8d794a889 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationHandler.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationHandler.java
@@ -159,11 +159,6 @@ public class ExternalNavigationHandler {
             return OverrideUrlLoadingResult.NO_OVERRIDE;
         }
 
-        // http://crbug.com/605302 : Allow Chrome to handle all pdf file downloads.
-        if (mDelegate.isPdfDownload(params.getUrl())) {
-            return OverrideUrlLoadingResult.NO_OVERRIDE;
-        }
-
         // pageTransition is a combination of an enumeration (core value) and bitmask.
         int pageTransitionCore = params.getPageTransition() & PageTransition.CORE_MASK;
         boolean isLink = pageTransitionCore == PageTransition.LINK;
@@ -194,6 +189,11 @@ public class ExternalNavigationHandler {
             return OverrideUrlLoadingResult.NO_OVERRIDE;
         }
 
+        // http://crbug.com/605302 : Allow Chrome to handle all pdf file downloads.
+        if (!isExternalProtocol && mDelegate.isPdfDownload(params.getUrl())) {
+            return OverrideUrlLoadingResult.NO_OVERRIDE;
+        }
+
         // If accessing a file URL, ensure that the user has granted the necessary file access
         // to Chrome.  This check should happen for reloads, navigations, etc..., which is why
         // it occurs before the subsequent blocks.