[Contextual Search] Use Mojo API for Quick Answers.

chrome/browser/android/contextualsearch/contextual_search_manager.h

Index: chrome/browser/android/contextualsearch/contextual_search_manager.h
diff --git a/chrome/browser/android/contextualsearch/contextual_search_manager.h b/chrome/browser/android/contextualsearch/contextual_search_manager.h
index 3df2d5122f3f65de8ba268d40ac3881816e60f1a..868aea7c591d1445d9c52254c93e725949a59f1b 100644
--- a/chrome/browser/android/contextualsearch/contextual_search_manager.h
+++ b/chrome/browser/android/contextualsearch/contextual_search_manager.h
@@ -12,15 +12,17 @@
 #include "base/task/cancelable_task_tracker.h"
 #include "chrome/browser/android/contextualsearch/contextual_search_context.h"
 #include "chrome/browser/android/contextualsearch/contextual_search_delegate.h"
+#include "components/contextual_search/browser/contextual_search_js_api_handler.h"
 
 // Manages the native extraction and request logic for Contextual Search,
 // and interacts with the Java ContextualSearchManager for UX.
 // Most of the work is done by the associated ContextualSearchDelegate.
-class ContextualSearchManager {
+class ContextualSearchManager
+    : public contextual_search::ContextualSearchJsApiHandler {
  public:
   // Constructs a native manager associated with the Java manager.
   ContextualSearchManager(JNIEnv* env, jobject obj);
-  virtual ~ContextualSearchManager();
+  ~ContextualSearchManager() override;
 
   // Called by the Java ContextualSearchManager when it is being destroyed.
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
@@ -60,6 +62,14 @@ class ContextualSearchManager {
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj);
 
+  // Enables the Contextual Search JS API for the given |ContentViewCore|.
+  void AddViewForContextualSearchJsApi(JNIEnv* env,

[mdjones, 2016/01/09 00:59:38]

I would consider renaming to something like
"enableJSApiFor[ContentViewCore|Page](...)" as the ContentViewCore view isn't
really being added to anything.

[Donn Denman, 2016/01/11 20:31:34]

Done.

+                                     jobject obj,
+                                     jobject j_overlay_content_view_core);
+
+  // ContextualSearchJsApiHandler overrides:
+  void SetCaption(std::string caption, bool does_answer) override;
+
  private:
   void OnSearchTermResolutionResponse(
       const ResolvedSearchTerm& resolved_search_term);