[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..684ccb60138fd747608edc700cdf6bf391be8f86 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"
@@ -382,6 +383,29 @@ 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() const {
+  RenderWidgetHostImpl* host =
+      RenderWidgetHostImpl::From(GetRenderWidgetHost());
+
+  if (!host || !host->delegate())
+    return nullptr;
+
+  TextInputManager* manager = host->delegate()->GetTextInputManager();
+
+  // If this is the first time getting a reference to this TextInputManager, we
+  // should get it to register this view.
+  if (!manager->IsRegisteredView(this))
+    manager->Register(const_cast<RenderWidgetHostViewBase*>(this));

[EhsanK, 2016/05/06 18:23:43]

I am not sure how OK this is, but the reason for this const_cast is that we need
this method to be const. This is solely because of the getter methods in
ui::TextInputClient which are defined const.

+
+  return manager;
+}
+
 void RenderWidgetHostViewBase::AddObserver(
     RenderWidgetHostViewBaseObserver* observer) {
   observers_.AddObserver(observer);