[DevTools] Implement Page.canEmulate capability.

content/browser/devtools/renderer_overrides_handler.cc

 // Copyright (c) 2013 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 "content/browser/devtools/renderer_overrides_handler.h"
 
 #include <map>
 #include <string>
 
 #include "base/barrier_closure.h"
@@ skipping 22 matching lines @@
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/page_transition_types.h"
 #include "content/public/common/referrer.h"
+#include "content/public/common/url_constants.h"
 #include "ipc/ipc_sender.h"
 #include "net/base/net_util.h"
 #include "third_party/WebKit/public/platform/WebCursorInfo.h"
 #include "third_party/WebKit/public/platform/WebScreenInfo.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/gfx/codec/jpeg_codec.h"
 #include "ui/gfx/codec/png_codec.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/screen.h"
@@ skipping 84 matching lines @@
       devtools::Page::captureScreenshot::kName,
       base::Bind(
           &RendererOverridesHandler::PageCaptureScreenshot,
           base::Unretained(this)));
   RegisterCommandHandler(
       devtools::Page::setTouchEmulationEnabled::kName,
       base::Bind(
           &RendererOverridesHandler::PageSetTouchEmulationEnabled,
           base::Unretained(this)));
   RegisterCommandHandler(
+      devtools::Page::canEmulate::kName,
+      base::Bind(
+          &RendererOverridesHandler::PageCanEmulate,
+          base::Unretained(this)));
+  RegisterCommandHandler(
       devtools::Page::canScreencast::kName,
       base::Bind(
           &RendererOverridesHandler::PageCanScreencast,
           base::Unretained(this)));
   RegisterCommandHandler(
       devtools::Page::startScreencast::kName,
       base::Bind(
           &RendererOverridesHandler::PageStartScreencast,
           base::Unretained(this)));
   RegisterCommandHandler(
@@ skipping 401 matching lines @@
   }
 
   touch_emulation_enabled_ = enabled;
   UpdateTouchEventEmulationState();
 
   // Pass to renderer.
   return NULL;
 }
 
 scoped_refptr<DevToolsProtocol::Response>
+RendererOverridesHandler::PageCanEmulate(
+    scoped_refptr<DevToolsProtocol::Command> command) {
+  base::DictionaryValue* result = new base::DictionaryValue();
+#if defined(OS_ANDROID)
+  result->SetBoolean(devtools::kResult, false);
+#else
+  if (WebContents* web_contents = WebContents::FromRenderViewHost(host_)) {
+    result->SetBoolean(
+        devtools::kResult,
+        !web_contents->GetVisibleURL().SchemeIs(kChromeDevToolsScheme));
+  } else {
+    result->SetBoolean(devtools::kResult, true);
+  }
+#endif  // defined(OS_ANDROID)
+  return command->SuccessResponse(result);
+}
+
+scoped_refptr<DevToolsProtocol::Response>
 RendererOverridesHandler::PageCanScreencast(
     scoped_refptr<DevToolsProtocol::Command> command) {
   base::DictionaryValue* result = new base::DictionaryValue();
 #if defined(OS_ANDROID)
   result->SetBoolean(devtools::kResult, true);
 #else
   result->SetBoolean(devtools::kResult, false);
 #endif  // defined(OS_ANDROID)
   return command->SuccessResponse(result);
 }
@@ skipping 723 matching lines @@
     return;
   bool enabled = touch_emulation_enabled_ || screencast_command_;
   host_->SetTouchEventEmulationEnabled(enabled);
   WebContentsImpl* web_contents = static_cast<WebContentsImpl*>(
       WebContents::FromRenderViewHost(host_));
   if (web_contents)
     web_contents->SetForceDisableOverscrollContent(enabled);
 }
 
 }  // namespace content