Update touch selection to only modify one selection point at a time.

content/renderer/render_frame_impl.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/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 806 matching lines @@
     IPC_MESSAGE_HANDLER(InputMsg_Undo, OnUndo)
     IPC_MESSAGE_HANDLER(InputMsg_Redo, OnRedo)
     IPC_MESSAGE_HANDLER(InputMsg_Cut, OnCut)
     IPC_MESSAGE_HANDLER(InputMsg_Copy, OnCopy)
     IPC_MESSAGE_HANDLER(InputMsg_Paste, OnPaste)
     IPC_MESSAGE_HANDLER(InputMsg_PasteAndMatchStyle, OnPasteAndMatchStyle)
     IPC_MESSAGE_HANDLER(InputMsg_Delete, OnDelete)
     IPC_MESSAGE_HANDLER(InputMsg_SelectAll, OnSelectAll)
     IPC_MESSAGE_HANDLER(InputMsg_SelectRange, OnSelectRange)
     IPC_MESSAGE_HANDLER(InputMsg_Unselect, OnUnselect)
+    IPC_MESSAGE_HANDLER(InputMsg_MoveSelectionExtent, OnMoveSelectionExtent)
     IPC_MESSAGE_HANDLER(InputMsg_Replace, OnReplace)
     IPC_MESSAGE_HANDLER(InputMsg_ReplaceMisspelling, OnReplaceMisspelling)
     IPC_MESSAGE_HANDLER(InputMsg_ExtendSelectionAndDelete,
                         OnExtendSelectionAndDelete)
     IPC_MESSAGE_HANDLER(InputMsg_SetCompositionFromExistingText,
                         OnSetCompositionFromExistingText)
     IPC_MESSAGE_HANDLER(FrameMsg_CSSInsertRequest, OnCSSInsertRequest)
     IPC_MESSAGE_HANDLER(FrameMsg_JavaScriptExecuteRequest,
                         OnJavaScriptExecuteRequest)
     IPC_MESSAGE_HANDLER(FrameMsg_JavaScriptExecuteRequestForTests,
@@ skipping 380 matching lines @@
 
   base::AutoReset<bool> handling_select_range(&handling_select_range_, true);
   frame_->selectRange(start, end);
 }
 
 void RenderFrameImpl::OnUnselect() {
   base::AutoReset<bool> handling_select_range(&handling_select_range_, true);
   frame_->executeCommand(WebString::fromUTF8("Unselect"), GetFocusedElement());
 }
 
+void RenderFrameImpl::OnMoveSelectionExtent(const gfx::Point& point) {
+  // This IPC is dispatched by RenderWidgetHost, so use its routing id.
+  Send(new ViewHostMsg_MoveSelectionExtent_ACK(
+      GetRenderWidget()->routing_id()));
+
+  base::AutoReset<bool> handling_select_range(&handling_select_range_, true);
+  frame_->moveSelectionExtent(point);
+}
+
 void RenderFrameImpl::OnReplace(const base::string16& text) {
   if (!frame_->hasSelection())
     frame_->selectWordAroundCaret();
 
   frame_->replaceSelection(text);
 }
 
 void RenderFrameImpl::OnReplaceMisspelling(const base::string16& text) {
   if (!frame_->hasSelection())
     return;
@@ skipping 2737 matching lines @@
 
 #if defined(ENABLE_BROWSER_CDMS)
 RendererCdmManager* RenderFrameImpl::GetCdmManager() {
   if (!cdm_manager_)
     cdm_manager_ = new RendererCdmManager(this);
   return cdm_manager_;
 }
 #endif  // defined(ENABLE_BROWSER_CDMS)
 
 }  // namespace content