Replace screen capture confirmation infobar with a message box.

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 14378e0f15722587b9bd2d8f4214ea5360237d92..a0114401e46fd722e838ab5650b2b5efd29c033c 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -14858,9 +14858,6 @@ Some features may be unavailable.  Please check that the profile exists and you
     <message name="IDS_MEDIA_CAPTURE_VIDEO_ONLY" desc="Question asked on the info bar whenever a web page requests access to the computer's camera.">
       <ph name="HOST">$1<ex>html5rocks.com</ex></ph> wants to use your camera.
     </message>
-    <message name="IDS_MEDIA_CAPTURE_SCREEN" desc="Text on the info bar that's shown when screen capturing is requrested by the tab.">
-      <ph name="HOST">$1<ex>html5rocks.com</ex></ph> wants to capture the content of your screen.
-    </message>
     <message name="IDS_MEDIA_CAPTURE_ALLOW" desc="Label for a button that grants access to a web page, so they can use a camera and/or a microphone.">
       Allow
     </message>
@@ -14868,6 +14865,14 @@ Some features may be unavailable.  Please check that the profile exists and you
       Deny
     </message>
 
+    <!-- Screen Capture messages -->
+    <message name="IDS_MEDIA_SCREEN_CAPTURE_CONFIRMATION_TITLE" desc="Title for the prompt shown when screen capturing is requrested by an app.">
+      <ph name="APP_NAME">$1<ex>html5rocks.com</ex></ph> Screen Sharing Request
+    </message>
+    <message name="IDS_MEDIA_SCREEN_CAPTURE_CONFIRMATION_TEXT" desc="Text for the prompt shown when screen capturing is requrested by an app.">
+      Do you want <ph name="APP_NAME">$1<ex>html5rocks.com</ex></ph> to share your screen?
+    </message>
+
     <!-- MediaStream capture status tray icon -->
     <message name="IDS_MEDIA_STREAM_STATUS_TRAY_TEXT_AUDIO_AND_VIDEO" desc="Tool tip for the capture status tray icon when microphone and camera are being used">
       <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> is using your camera and microphone.