Suppress the Android keyboard when selecting VR UI input fields.

chrome/browser/android/vr_shell/vr_shell.cc

 // Copyright 2016 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 "chrome/browser/android/vr_shell/vr_shell.h"
 
 #include <android/native_window_jni.h>
 
 #include <string>
 #include <utility>
@@ skipping 45 matching lines @@
 
 static const char kVrShellUIURL[] = "chrome://vr-shell-ui";
 
 void SetIsInVR(content::WebContents* contents, bool is_in_vr) {
   if (contents && contents->GetRenderWidgetHostView())
     contents->GetRenderWidgetHostView()->SetIsInVR(is_in_vr);
 }
 
 }  // namespace
 
+class UiWebContentsObserver : public content::WebContentsObserver {

[cjgrant, 2017/03/07 20:34:47]

This class could live in a separate file, but given its size, I started it here.
 Happy to move it out if you guys prefer.

[mthiesse, 2017/03/07 20:49:24]

VrShell is already an observer of the UI web contents. Please either re-use
that, or merge that one into this one.

[cjgrant, 2017/03/07 21:08:46]

Done.  Wow, need to check eyes. 

+ public:
+  explicit UiWebContentsObserver(content::WebContents* web_contents)
+      : WebContentsObserver(web_contents) {}
+
+ private:
+  void RenderViewHostChanged(content::RenderViewHost* old_host,
+                             content::RenderViewHost* new_host) override {
+    new_host->GetWidget()->GetView()->SetIsInVR(true);
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(UiWebContentsObserver);
+};
+
 VrShell::VrShell(JNIEnv* env,
                  jobject obj,
                  ui::WindowAndroid* content_window,
                  content::WebContents* ui_contents,
                  ui::WindowAndroid* ui_window,
                  bool for_web_vr,
                  VrShellDelegate* delegate,
                  gvr_context* gvr_api,
                  bool reprojected_rendering)
     : WebContentsObserver(ui_contents),
@@ skipping 55 matching lines @@
         j_motion_event_synthesizer_.obj(),
         Java_VrShellImpl_getNativePageScrollRatio(env, j_vr_shell_.obj()));
     content_input_manager_ = nullptr;
     vr_web_contents_observer_ = nullptr;
     metrics_helper_ = nullptr;
     return;
   }
   content_input_manager_ = base::MakeUnique<VrInputManager>(main_contents_);
   vr_web_contents_observer_ = base::MakeUnique<VrWebContentsObserver>(
       main_contents_, html_interface_.get(), this);
+  ui_web_contents_observer_ =
+      base::MakeUnique<UiWebContentsObserver>(ui_contents_);
   // TODO(billorr): Make VrMetricsHelper tab-aware and able to track multiple
   // tabs. crbug.com/684661
   metrics_helper_ = base::MakeUnique<VrMetricsHelper>(main_contents_);
   metrics_helper_->SetVRActive(true);
   metrics_helper_->SetWebVREnabled(webvr_mode_);
 }
 
 void VrShell::SetUiState() {
   if (!main_contents_) {
     // TODO(mthiesse): Properly handle native page URLs.
@@ skipping 536 matching lines @@
            jboolean reprojected_rendering) {
   return reinterpret_cast<intptr_t>(new VrShell(
       env, obj, reinterpret_cast<ui::WindowAndroid*>(content_window_android),
       content::WebContents::FromJavaWebContents(ui_web_contents),
       reinterpret_cast<ui::WindowAndroid*>(ui_window_android), for_web_vr,
       VrShellDelegate::GetNativeVrShellDelegate(env, delegate),
       reinterpret_cast<gvr_context*>(gvr_api), reprojected_rendering));
 }
 
 }  // namespace vr_shell