[PresentationAPI] Implementing start/joinSession from WebPresentationClient to PresentationService.

content/shell/renderer/test_runner/mock_presentation_client.cc

Index: content/shell/renderer/test_runner/mock_presentation_client.cc
diff --git a/content/shell/renderer/test_runner/mock_presentation_client.cc b/content/shell/renderer/test_runner/mock_presentation_client.cc
index 02012bca821851a92d8e266e1e6c1aedfc266c70..7d1c2561ccf8ae4ad655bf190e93cde3ba832631 100644
--- a/content/shell/renderer/test_runner/mock_presentation_client.cc
+++ b/content/shell/renderer/test_runner/mock_presentation_client.cc
@@ -50,6 +50,20 @@ void MockPresentationClient::setController(
   controller_ = controller;
 }
 
+void MockPresentationClient::startSession(
+    const blink::WebString& presentationUrl,
+    const blink::WebString& presentationId,
+    blink::WebPresentationSessionClientCallbacks* callback) {
+  NOTIMPLEMENTED();

[mlamouri (slow - plz ping), 2015/02/23 14:07:39]

delete callback;

[whywhat, 2015/02/25 14:12:42]

Done.

+}
+
+void MockPresentationClient::joinSession(
+    const blink::WebString& presentationUrl,
+    const blink::WebString& presentationId,
+    blink::WebPresentationSessionClientCallbacks* callback) {
+  NOTIMPLEMENTED();

[mlamouri (slow - plz ping), 2015/02/23 14:07:39]

delete callback;

[whywhat, 2015/02/25 14:12:42]

Done.

+}
+
 void MockPresentationClient::updateAvailableChangeWatched(bool watched) {
   if (!watched)
     return;