Browser Side Text Input State Tracking for OOPIF.

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 780ced5af6016c192761f09227148b61bae5ff28..7d1938200fdfad7b07f680c26918955d9879a361 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.cc
+++ b/content/browser/renderer_host/render_widget_host_view_base.cc
@@ -10,9 +10,16 @@
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/renderer_host/input/synthetic_gesture_target_base.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
+#include "content/browser/renderer_host/render_view_host_delegate.h"
+#include "content/browser/renderer_host/render_view_host_impl.h"
+#include "content/browser/renderer_host/render_widget_host_delegate.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/common/content_switches_internal.h"
+#include "content/common/input_messages.h"
+#include "content/common/site_isolation_policy.h"
+#include "content/common/view_messages.h"
 #include "content/public/browser/render_widget_host_view_frame_subscriber.h"
+#include "content/public/common/browser_plugin_guest_mode.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/geometry/point_conversions.h"
 #include "ui/gfx/geometry/size_conversions.h"
@@ -377,7 +384,10 @@ RenderWidgetHostViewBase::RenderWidgetHostViewBase()
       current_display_rotation_(gfx::Display::ROTATE_0),
       pinch_zoom_enabled_(content::IsPinchToZoomEnabled()),
       renderer_frame_number_(0),
+      text_input_state_(new TextInputState),
+      cached_text_input_state_(text_input_state_.get()),
       weak_factory_(this) {
+  text_input_state_->can_compose_inline = true;
 }
 
 RenderWidgetHostViewBase::~RenderWidgetHostViewBase() {
@@ -701,4 +711,35 @@ void RenderWidgetHostViewBase::TransformPointToLocalCoordSpace(
   *transformed_point = point;
 }
 
+void RenderWidgetHostViewBase::TextInputStateChanged(
+    const ViewHostMsg_TextInputState_Params& params) {
+#if defined(OS_ANDROID)
+  if (params.is_non_ime_change) {
+    // Sends an acknowledgement to the renderer of a processed IME event.
+    GetRenderWidgetHost()->Send(
+        new InputMsg_ImeEventAck(GetRenderWidgetHost()->GetRoutingID()));
+  }
+#endif
+  *text_input_state_ = params;
+  UpdateTextInputState();
+}
+
+const TextInputState* RenderWidgetHostViewBase::FindCurrentTextInputState() {
+  if (!SiteIsolationPolicy::AreCrossProcessFramesPossible())
+    return text_input_state_.get();
+
+  const TextInputState* state = text_input_state_.get();
+  RenderWidgetHostViewBase* focused_view =
+      RenderWidgetHostImpl::From(GetRenderWidgetHost())
+          ->delegate()
+          ->GetFocusedView();
+  if (focused_view && focused_view != this)
+    state = focused_view->FindCurrentTextInputState();
+  return state;
+}
+
+void RenderWidgetHostViewBase::UpdateTextInputState() {
+  cached_text_input_state_ = FindCurrentTextInputState();
+}
+
 }  // namespace content