[reland] Browser Side Text Input State Tracking for OOPIF (Aura Only)

content/browser/renderer_host/render_widget_host_view_base.cc

Index: content/browser/renderer_host/render_widget_host_view_base.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_base.cc b/content/browser/renderer_host/render_widget_host_view_base.cc
index dd88faea8fae27b0cfc71207869e299227a5a363..160d42e552c893fd3c9f753bbabf0d47919f95d7 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.cc
+++ b/content/browser/renderer_host/render_widget_host_view_base.cc
@@ -13,6 +13,7 @@
 #include "content/browser/renderer_host/render_widget_host_delegate.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_base_observer.h"
+#include "content/browser/renderer_host/text_input_manager.h"
 #include "content/common/content_switches_internal.h"
 #include "content/public/browser/render_widget_host_view_frame_subscriber.h"
 #include "ui/display/display.h"
@@ -40,6 +41,7 @@ RenderWidgetHostViewBase::RenderWidgetHostViewBase()
       current_device_scale_factor_(0),
       current_display_rotation_(display::Display::ROTATE_0),
       pinch_zoom_enabled_(content::IsPinchToZoomEnabled()),
+      text_input_manager_(nullptr),
       renderer_frame_number_(0),
       weak_factory_(this) {}
 
@@ -267,6 +269,14 @@ void RenderWidgetHostViewBase::FlushInput() {
   impl->FlushInput();
 }
 
+void RenderWidgetHostViewBase::OnTextInputManagerDestroyed(
+    TextInputManager* text_input_manager) {
+  DCHECK(text_input_manager_ == text_input_manager);
+
+  text_input_manager_->Unregister(this);
+  text_input_manager_ = nullptr;
+}
+
 void RenderWidgetHostViewBase::OnTextSurroundingSelectionResponse(
     const base::string16& content,
     size_t start_offset,
@@ -382,6 +392,27 @@ void RenderWidgetHostViewBase::TransformPointToLocalCoordSpace(
   *transformed_point = point;
 }
 
+void RenderWidgetHostViewBase::TextInputStateChanged(
+    const TextInputState& text_input_state) {
+  if (GetTextInputManager())
+    GetTextInputManager()->UpdateTextInputState(this, text_input_state);
+}
+
+TextInputManager* RenderWidgetHostViewBase::GetTextInputManager() {
+  if (text_input_manager_)
+    return text_input_manager_;
+
+  RenderWidgetHostImpl* host =
+      RenderWidgetHostImpl::From(GetRenderWidgetHost());
+  if (host && host->delegate())
+    text_input_manager_ = host->delegate()->GetTextInputManager();
+
+  if (text_input_manager_)
+    text_input_manager_->Register(this);
+
+  return text_input_manager_;
+}
+
 void RenderWidgetHostViewBase::AddObserver(
     RenderWidgetHostViewBaseObserver* observer) {
   observers_.AddObserver(observer);