Revert of Extracting placeholder information from Webkit to Blimp

blimp/engine/session/tab.cc

Index: blimp/engine/session/tab.cc
diff --git a/blimp/engine/session/tab.cc b/blimp/engine/session/tab.cc
index 49bba5de382a29d56f666c52e058d9c55539e290..895902350dcc244a3438d8d417faa6f5cd83685c 100644
--- a/blimp/engine/session/tab.cc
+++ b/blimp/engine/session/tab.cc
@@ -19,7 +19,6 @@
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
-#include "content/public/common/form_field_data.h"
 #include "content/public/common/renderer_preferences.h"
 #include "ui/aura/window.h"
 #include "ui/gfx/geometry/size.h"
@@ -35,9 +34,7 @@
       tab_id_(tab_id),
       render_widget_feature_(render_widget_feature),
       navigation_message_sender_(navigation_message_sender),
-      page_load_tracker_(web_contents_.get(), this),
-      current_form_request_id_(0),
-      weak_factory_(this) {
+      page_load_tracker_(web_contents_.get(), this) {
   DCHECK(render_widget_feature_);
   DCHECK(navigation_message_sender_);
 
@@ -171,41 +168,6 @@
   render_widget_host->ForwardGestureEvent(*event);
 }
 
-void Tab::ShowTextInputUI() {
-  current_form_request_id_++;
-  content::FormFieldDataCallback callback =
-      base::Bind(&Tab::ProcessTextInputInfo, weak_factory_.GetWeakPtr(),
-                 current_form_request_id_);
-
-  content::RenderFrameHost* focused_frame = web_contents()->GetFocusedFrame();
-  if (focused_frame) {
-    focused_frame->RequestFocusedFormFieldData(callback);
-  }
-}
-
-void Tab::HideTextInputUI() {
-  current_form_request_id_++;
-  render_widget_feature_->SendHideImeRequest(
-      tab_id(),
-      web_contents()->GetRenderWidgetHostView()->GetRenderWidgetHost());
-}
-
-void Tab::ProcessTextInputInfo(int request_id,
-                               const content::FormFieldData& field) {
-  if (field.text_input_type == ui::TEXT_INPUT_TYPE_NONE)
-    return;
-
-  // Discard the results for old requests.
-  if (request_id < current_form_request_id_) {
-    return;
-  }
-
-  // TODO(shaktisahu): Remove adding RenderWidgetHost info to the proto.
-  render_widget_feature_->SendShowImeRequest(
-      tab_id(),
-      web_contents()->GetRenderWidgetHostView()->GetRenderWidgetHost(), field);
-}
-
 void Tab::OnCompositorMessageReceived(
     content::RenderWidgetHost* render_widget_host,
     const std::vector<uint8_t>& message) {