Turn webspeech on/off when tab goes fore/background

chrome/browser/media/media_stream_devices_controller.cc

Index: chrome/browser/media/media_stream_devices_controller.cc
diff --git a/chrome/browser/media/media_stream_devices_controller.cc b/chrome/browser/media/media_stream_devices_controller.cc
index 1103f9af842553ecfca9291206d657caa8c569f8..7d2bf245050f0a464d6c6348c43b24efead6c61e 100644
--- a/chrome/browser/media/media_stream_devices_controller.cc
+++ b/chrome/browser/media/media_stream_devices_controller.cc
@@ -23,12 +23,12 @@
 #include "chrome/common/pref_names.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/render_widget_host_view.h"
 #include "content/public/common/media_stream_request.h"
 #include "extensions/common/constants.h"
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
 #include "ui/base/l10n/l10n_util.h"
-

[DaleCurtis, 2014/07/23 22:17:19]

Line break is normally kept here.

[qinmin, 2014/07/23 22:28:48]

Done.

 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/login/users/user_manager.h"
 #endif
@@ -662,7 +662,7 @@ bool MediaStreamDevicesController::IsDeviceAudioCaptureRequestedAndAllowed()
     const {
   MediaStreamTypeSettingsMap::const_iterator it =
       request_permissions_.find(content::MEDIA_DEVICE_AUDIO_CAPTURE);
-  return (it != request_permissions_.end() &&
+  return (it != request_permissions_.end() && IsCaptureDeviceRequestAllowed() &&
           it->second.permission == MEDIA_ALLOWED);
 }
 
@@ -670,6 +670,14 @@ bool MediaStreamDevicesController::IsDeviceVideoCaptureRequestedAndAllowed()
     const {
   MediaStreamTypeSettingsMap::const_iterator it =
       request_permissions_.find(content::MEDIA_DEVICE_VIDEO_CAPTURE);
-  return (it != request_permissions_.end() &&
+  return (it != request_permissions_.end() && IsCaptureDeviceRequestAllowed() &&
           it->second.permission == MEDIA_ALLOWED);
 }
+
+bool MediaStreamDevicesController::IsCaptureDeviceRequestAllowed() const {
+#if defined(OS_ANDROID)
+  // Don't approve device requests if the tab was hidden.
+  return web_contents_->GetRenderWidgetHostView()->IsShowing();
+#endif
+  return true;
+}