Click to Open PDF: Open PDF once View PDF is clicked.

chrome/browser/plugins/plugin_observer.cc

Index: chrome/browser/plugins/plugin_observer.cc
diff --git a/chrome/browser/plugins/plugin_observer.cc b/chrome/browser/plugins/plugin_observer.cc
index 6f939ac790ca9b8ad9b3fabee2019b5bf5470162..f5a46fae5ab1b8ee4d29ec5fa7f7ec85a76beebe 100644
--- a/chrome/browser/plugins/plugin_observer.cc
+++ b/chrome/browser/plugins/plugin_observer.cc
@@ -36,6 +36,7 @@
 #include "components/infobars/core/simple_alert_infobar_delegate.h"
 #include "components/metrics_services_manager/metrics_services_manager.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/child_process_security_policy.h"
 #include "content/public/browser/plugin_service.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_view_host.h"
@@ -256,6 +257,7 @@ void PluginObserver::PluginCrashed(const base::FilePath& plugin_path,
 bool PluginObserver::OnMessageReceived(
       const IPC::Message& message,
       content::RenderFrameHost* render_frame_host) {
+  bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PluginObserver, message)
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_BlockedOutdatedPlugin,
                         OnBlockedOutdatedPlugin)
@@ -267,7 +269,14 @@ bool PluginObserver::OnMessageReceived(
                         OnShowFlashPermissionBubble)
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_CouldNotLoadPlugin,
                         OnCouldNotLoadPlugin)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+
+  if (handled)
+    return true;
 
+  IPC_BEGIN_MESSAGE_MAP_WITH_PARAM(PluginObserver, message, render_frame_host)
+    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_OpenPDF, OnOpenPDF)
     IPC_MESSAGE_UNHANDLED(return false)
   IPC_END_MESSAGE_MAP()
 
@@ -335,3 +344,18 @@ void PluginObserver::OnCouldNotLoadPlugin(const base::FilePath& plugin_path) {
                                  plugin_name),
       true);
 }
+
+void PluginObserver::OnOpenPDF(content::RenderFrameHost* render_frame_host,
+                               const GURL& url) {
+  if (!content::ChildProcessSecurityPolicy::GetInstance()->CanRequestURL(
+          render_frame_host->GetRoutingID(), url))
+    return;
+
+  web_contents()->OpenURL(content::OpenURLParams(
+      url,
+      content::Referrer::SanitizeForRequest(
+          url, content::Referrer(web_contents()->GetURL(),
+                                 blink::kWebReferrerPolicyDefault)),
+      WindowOpenDisposition::NEW_FOREGROUND_TAB,
+      ui::PAGE_TRANSITION_AUTO_BOOKMARK, false));
+}