Plumbing for browser process to access text surrounding selection.

content/browser/android/content_view_core_impl.cc

Index: content/browser/android/content_view_core_impl.cc
diff --git a/content/browser/android/content_view_core_impl.cc b/content/browser/android/content_view_core_impl.cc
index 8fdfb8c27fc22a55f2f07009d3d08203e02b8e8a..2f0322f30311b79dae940d09a35013bce3206172 100644
--- a/content/browser/android/content_view_core_impl.cc
+++ b/content/browser/android/content_view_core_impl.cc
@@ -37,6 +37,7 @@
 #include "content/browser/screen_orientation/screen_orientation_dispatcher_host.h"
 #include "content/browser/ssl/ssl_host_state.h"
 #include "content/browser/web_contents/web_contents_view_android.h"
+#include "content/common/frame_messages.h"
 #include "content/common/input/web_input_event_traits.h"
 #include "content/common/input_messages.h"
 #include "content/common/view_messages.h"
@@ -1534,6 +1535,20 @@ void ContentViewCoreImpl::SetAccessibilityEnabledInternal(bool enabled) {
   }
 }
 
+void ContentViewCoreImpl::OnTextSurroundingSelectionResponse(

[jdduke (slow), 2014/06/10 14:53:32]

As mentioned, let's defer adding the hooks into Java for now.  Donn can add them
as necessary when we actually expose the added methods publicly to an embedder
(the choice between a C++ or Java embedder has not yet been made). It should be
sufficient to simply drop the changes to ContentViewCore and
ContentViewCoreImpl, and leave an empty stub in RWHVAndroid.

+    const base::string16& content,
+    int start_offset,
+    int end_offset) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
+  if (obj.is_null())
+    return;
+
+  ScopedJavaLocalRef<jstring> jcontent = ConvertUTF16ToJavaString(env, content);
+  Java_ContentViewCore_onTextSurroundingSelectionResponse(
+      env, obj.obj(), jcontent.obj(), start_offset, end_offset);
+}
+
 void ContentViewCoreImpl::SendOrientationChangeEventInternal() {
   RenderWidgetHostViewAndroid* rwhv = GetRenderWidgetHostViewAndroid();
   if (rwhv)
@@ -1600,6 +1615,14 @@ void ContentViewCoreImpl::SetBackgroundOpaque(JNIEnv* env, jobject jobj,
     GetRenderWidgetHostViewAndroid()->SetBackgroundOpaque(opaque);
 }
 
+void ContentViewCoreImpl::TextSurroundingSelectionRequest(
+    JNIEnv*, jobject, jint max_length) {
+  RenderFrameHost* focused_frame = web_contents_->GetFocusedFrame();
+
+  focused_frame->Send(new FrameMsg_TextSurroundingSelectionRequest(
+      focused_frame->GetRoutingID(), max_length));
+}
+
 void ContentViewCoreImpl::OnSmartClipDataExtracted(
     const base::string16& result) {
   JNIEnv* env = AttachCurrentThread();