Plumb smooth scrolling in Chromium compositor

content/browser/web_contents/web_contents_android.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/web_contents/web_contents_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/command_line.h"
@@ skipping 375 matching lines @@
 void WebContentsAndroid::ScrollFocusedEditableNodeIntoView(
     JNIEnv* env,
     jobject obj) {
   RenderViewHost* host = web_contents_->GetRenderViewHost();
   if (!host)
     return;
   host->Send(new InputMsg_ScrollFocusedEditableNodeIntoRect(
       host->GetRoutingID(), gfx::Rect()));
 }
 
+void WebContentsAndroid::SmoothScroll(JNIEnv* env,
+                                      jobject obj,
+                                      jint target_x,
+                                      jint target_y,
+                                      jlong duration_ms) {
+  RenderViewHost* host = web_contents_->GetRenderViewHost();
+  if (!host)
+    return;
+
+  ContentViewCoreImpl* contentViewCore =
+      ContentViewCoreImpl::FromWebContents(web_contents_);
+  float scale_factor = contentViewCore->GetScaleFactor();
+  host->Send(new InputMsg_SmoothScroll(host->GetRoutingID(),
+                                       target_x / scale_factor,
+                                       target_y / scale_factor, duration_ms));
+}
+
 void WebContentsAndroid::SelectWordAroundCaret(JNIEnv* env, jobject obj) {
   RenderViewHost* host = web_contents_->GetRenderViewHost();
   if (!host)
     return;
   host->SelectWordAroundCaret();
 }
 
 void WebContentsAndroid::AdjustSelectionByCharacterOffset(JNIEnv* env,
                                                           jobject obj,
                                                           jint start_adjust,
@@ skipping 111 matching lines @@
 
 void WebContentsAndroid::ResumeMediaSession(JNIEnv* env, jobject obj) {
   web_contents_->ResumeMediaSession();
 }
 
 void WebContentsAndroid::SuspendMediaSession(JNIEnv* env, jobject obj) {
   web_contents_->SuspendMediaSession();
 }
 
 }  // namespace content