[Web Intents] Add ability to dispatch intents from extension-caused code (i.e. context menus)

chrome/browser/extensions/extension_host.cc

Index: chrome/browser/extensions/extension_host.cc
diff --git a/chrome/browser/extensions/extension_host.cc b/chrome/browser/extensions/extension_host.cc
index 4136689fc4d3ba4fee3dee8cf8126c860c06fbe5..8fd4756ee6a7e047d246fd8f32e3dc7b0a8b080d 100644
--- a/chrome/browser/extensions/extension_host.cc
+++ b/chrome/browser/extensions/extension_host.cc
@@ -45,6 +45,7 @@
 #include "content/public/browser/site_instance.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_view.h"
+#include "content/public/browser/web_intents_dispatcher.h"
 #include "grit/browser_resources.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
@@ -418,6 +419,28 @@ void ExtensionHost::OnStartDownload(
     OnStartDownload(source, download);
 }
 
+void ExtensionHost::WebIntentDispatch(
+    content::WebContents* web_contents,
+    content::WebIntentsDispatcher* intents_dispatcher) {
+#if !defined(OS_ANDROID)
+  scoped_ptr<content::WebIntentsDispatcher> dispatcher(intents_dispatcher);
+
+  Browser* browser = view() ? view()->browser()
+      : browser::FindBrowserWithWebContents(web_contents);
+
+  // For background scripts/pages, there will be no view(). In this case, we
+  // want to treat the intent as a browser-initiated one and deliver it into the
+  // current browser. It probably came from a context menu click or similar.
+  if (!browser)
+    browser = web_intents::GetBrowserForBackgroundWebIntentDelivery(profile());
+
+  if (browser) {
+    static_cast<WebContentsDelegate*>(browser)->
+        WebIntentDispatch(NULL, dispatcher.release());
+  }
+#endif
+}
+
 void ExtensionHost::WillRunJavaScriptDialog() {
   ExtensionProcessManager* pm =
       ExtensionSystem::Get(profile_)->process_manager();