Mojoify the RequestThumbnailForContextNode IPC message and reply

chrome/browser/ui/android/context_menu_helper.cc

Index: chrome/browser/ui/android/context_menu_helper.cc
diff --git a/chrome/browser/ui/android/context_menu_helper.cc b/chrome/browser/ui/android/context_menu_helper.cc
index ade834a6ac5d87bc4315a662615c2ca9148bf6ad..ee1a6237178e57f8cfe35c0d426214b602b289fa 100644
--- a/chrome/browser/ui/android/context_menu_helper.cc
+++ b/chrome/browser/ui/android/context_menu_helper.cc
@@ -9,8 +9,10 @@
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
+#include "base/bind_helpers.h"
 #include "chrome/browser/android/download/download_controller_base.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper.h"
+#include "chrome/common/thumbnail_capturer.mojom.h"
 #include "components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h"
 #include "content/public/browser/android/content_view_core.h"
 #include "content/public/browser/render_frame_host.h"
@@ -18,6 +20,7 @@
 #include "content/public/common/context_menu_params.h"
 #include "jni/ContextMenuHelper_jni.h"
 #include "jni/ContextMenuParams_jni.h"
+#include "services/service_manager/public/cpp/interface_provider.h"
 #include "third_party/WebKit/public/web/WebContextMenuData.h"
 #include "ui/android/window_android.h"
 #include "ui/gfx/geometry/point.h"
@@ -36,7 +39,7 @@ const char kDataReductionProxyPassthroughHeader[] =
     "Chrome-Proxy: pass-through\r\n";
 
 ContextMenuHelper::ContextMenuHelper(content::WebContents* web_contents)
-    : web_contents_(web_contents) {
+    : web_contents_(web_contents), weak_factory_(this) {
   JNIEnv* env = base::android::AttachCurrentThread();
   java_obj_.Reset(
       env,
@@ -149,17 +152,20 @@ void ContextMenuHelper::ShareImage(JNIEnv* env,
   if (!render_frame_host)
     return;
 
-  CoreTabHelper::FromWebContents(web_contents_)->
-      RequestThumbnailForContextNode(
-          render_frame_host,
-          0,
-          gfx::Size(kShareImageMaxWidth, kShareImageMaxHeight),
-          base::Bind(&ContextMenuHelper::OnShareImage,
-                     base::Unretained(this)));
+  chrome::mojom::ThumbnailCapturerPtr thumbnail_capturer;
+  render_frame_host->GetRemoteInterfaces()->GetInterface(&thumbnail_capturer);
+  // Bind the InterfacePtr into the callback so that it's kept alive until
+  // there's either a connection error or a response.
+  thumbnail_capturer->RequestThumbnailForContextNode(
+      0, gfx::Size(kShareImageMaxWidth, kShareImageMaxHeight),
+      base::Bind(&ContextMenuHelper::OnShareImage, weak_factory_.GetWeakPtr(),
+                 base::Passed(&thumbnail_capturer)));
 }
 
-void ContextMenuHelper::OnShareImage(const std::string& thumbnail_data,
-                                     const gfx::Size& original_size) {
+void ContextMenuHelper::OnShareImage(
+    chrome::mojom::ThumbnailCapturerPtr thumbnail_capturer,
+    const std::string& thumbnail_data,
+    const gfx::Size& original_size) {
   content::ContentViewCore* content_view_core =
       content::ContentViewCore::FromWebContents(web_contents_);
   if (!content_view_core)