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

R=ben@chromium.org,groby@chromium.org
BUG=109425,128964


Review URL: https://chromiumcodereview.appspot.com/10830102

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150876 0039d316-1c4b-4281-b951-d872f2087c98

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();

chrome/browser/extensions/extension_host.h

@@ -36,6 +36,7 @@ namespace content {
 class RenderProcessHost;
 class RenderWidgetHostView;
 class SiteInstance;
+class WebIntentsDispatcher;
 }
 
 namespace extensions {
@@ -166,6 +167,9 @@ class ExtensionHost : public content::WebContentsDelegate,
   virtual void CloseContents(content::WebContents* contents) OVERRIDE;
   virtual void OnStartDownload(content::WebContents* source,
                                content::DownloadItem* download) OVERRIDE;
+  virtual void WebIntentDispatch(
+      content::WebContents* web_contents,
+      content::WebIntentsDispatcher* intents_dispatcher) OVERRIDE;
 
   // content::NotificationObserver
   virtual void Observe(int type,

chrome/browser/intents/web_intents_util.cc

@@ -28,4 +28,11 @@ bool IsWebIntentsEnabledForProfile(Profile* profile) {
   return IsWebIntentsEnabled(profile->GetPrefs());
 }
 
+Browser* GetBrowserForBackgroundWebIntentDelivery(Profile* profile) {
+  Browser* browser = BrowserList::GetLastActive();
+  if (browser && profile && browser->profile() != profile)
+    return NULL;
+  return browser;
+}
+
 }  // namespace web_intents

chrome/browser/intents/web_intents_util.h

@@ -5,6 +5,7 @@
 #ifndef CHROME_BROWSER_INTENTS_WEB_INTENTS_UTIL_H_
 #define CHROME_BROWSER_INTENTS_WEB_INTENTS_UTIL_H_
 
+class Browser;
 class Profile;
 class PrefService;
 
@@ -20,6 +21,11 @@ bool IsWebIntentsEnabled(PrefService* prefs);
 // the Profile to check that WebIntents are enabled for.
 bool IsWebIntentsEnabledForProfile(Profile* profile);
 
+// In a context where we are generating a web intent based on internal events,
+// or from an extension background page, get the browser in which to show the
+// intent picker to the user.
+Browser* GetBrowserForBackgroundWebIntentDelivery(Profile* profile);
+
 }  // namespace web_intents
 
 #endif  // CHROME_BROWSER_INTENTS_WEB_INTENTS_UTIL_H_

chrome/browser/ui/browser_list.h

@@ -40,6 +40,10 @@ namespace content {
 class WebContents;
 }
 
+namespace web_intents {
+Browser* GetBrowserForBackgroundWebIntentDelivery(Profile*);
+}
+
 #if defined(USE_ASH)
 content::WebContents* GetActiveWebContents();
 #endif
@@ -102,6 +106,8 @@ class BrowserList {
   friend class TaskManager;
   friend class WindowSizer;
   friend class browser::BrowserActivityObserver;
+  friend Browser* web_intents::GetBrowserForBackgroundWebIntentDelivery(
+      Profile*);
 #if defined(OS_CHROMEOS)
   friend class chromeos::ScreenLocker;
 #endif