[Chromecast] Set view name based on params.activity_id

Set the window name since it makes it easier to track windows while
debugging.

BUG=None
TEST=Compiled

Change-Id: I301c3c55dc5709d7b009c140d4bff57cccad3809
Reviewed-on: https://chromium-review.googlesource.com/1121081Reviewed-by: Sergey Volk <servolk@chromium.org>
Commit-Queue: Daniel Nicoara <dnicoara@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577705}

chromecast/browser/cast_web_view_default.cc

@@ -78,6 +78,9 @@ CastWebViewDefault::CastWebViewDefault(
   DCHECK(window_);
   content::WebContentsObserver::Observe(web_contents_.get());
   web_contents_->SetDelegate(this);
+#if defined(USE_AURA)
+  web_contents_->GetNativeView()->SetName(params.activity_id);
+#endif
 
 #if BUILDFLAG(IS_ANDROID_THINGS)
 // Configure the ducking multiplier for AThings speakers. When CMA backend is

chromecast/browser/cast_web_view_extension.cc

@@ -11,6 +11,7 @@
 #include "content/public/browser/web_contents_observer.h"
 #include "extensions/browser/extension_system.h"
 #include "net/base/net_errors.h"
+#include "ui/aura/window.h"
 
 namespace chromecast {
 
@@ -35,6 +36,7 @@ CastWebViewExtension::CastWebViewExtension(
           shell::CastBrowserProcess::GetInstance()->remote_debugging_server()) {
   DCHECK(delegate_);
   content::WebContentsObserver::Observe(web_contents());
+  web_contents()->GetNativeView()->SetName(params.activity_id);
   // If this CastWebView is enabled for development, start the remote debugger.
   if (params.enabled_for_dev) {
     LOG(INFO) << "Enabling dev console for " << web_contents()->GetVisibleURL();