[WIP] Add support for Android SuggestionSpans when editing text

content/browser/android/ime_adapter_android.h

Index: content/browser/android/ime_adapter_android.h
diff --git a/content/browser/android/ime_adapter_android.h b/content/browser/android/ime_adapter_android.h
index d30d2e1c38555c4fe7ef6248e6dba14172c0cf70..1fa7aea60935d98b7922a8d89f9e572b4af72b3a 100644
--- a/content/browser/android/ime_adapter_android.h
+++ b/content/browser/android/ime_adapter_android.h
@@ -13,11 +13,14 @@
 #include "base/memory/weak_ptr.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/web_contents_observer.h"
+#include "third_party/WebKit/public/platform/input_host.mojom.h"
+#include "third_party/WebKit/public/platform/input_messages.mojom.h"
 #include "ui/gfx/geometry/rect_f.h"
 
 namespace blink {
 
 struct WebCompositionUnderline;
+struct WebTextSuggestionInfo;
 
 }  // namespace blink
 
@@ -86,11 +89,21 @@ class CONTENT_EXPORT ImeAdapterAndroid : public WebContentsObserver {
                            bool monitorRequest);
   bool RequestTextInputStateUpdate(JNIEnv*,
                                    const base::android::JavaParamRef<jobject>&);
+  void ApplySuggestionReplacement(JNIEnv*,
+                                  const base::android::JavaParamRef<jobject>&,
+                                  long documentMarkerID,
+                                  int suggestionIndex);
+  void DeleteSuggestionHighlight(JNIEnv*,
+                                 const base::android::JavaParamRef<jobject>&);
+  void SuggestionMenuClosed(JNIEnv*,
+                            const base::android::JavaParamRef<jobject>&);
 
   // Called from native -> java
   void CancelComposition();
   void FocusedNodeChanged(bool is_editable_node);
   void SetCharacterBounds(const std::vector<gfx::RectF>& rects);
+  void ShowTextSuggestionMenu(
+      const std::vector<blink::mojom::TextSuggestionInfoPtr>& suggestion_infos);
 
   base::android::ScopedJavaLocalRef<jobject> java_ime_adapter_for_testing(
       JNIEnv* env) {
@@ -113,11 +126,13 @@ class CONTENT_EXPORT ImeAdapterAndroid : public WebContentsObserver {
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jobject>& text,
       const base::string16& text16);
+  const blink::mojom::TextSuggestionBackendPtr& GetTextSuggestionBackend();
   RenderWidgetHostViewAndroid* GetRenderWidgetHostViewAndroid() const;
   void UpdateRenderProcessConnection(RenderWidgetHostViewAndroid* new_rwhva);
 
   base::WeakPtr<RenderWidgetHostViewAndroid> rwhva_;
   JavaObjectWeakGlobalRef java_ime_adapter_;
+  blink::mojom::TextSuggestionBackendPtr text_suggestion_backend_;
 };
 
 bool RegisterImeAdapter(JNIEnv* env);