Index: chrome/browser/net/client_hints.cc |
diff --git a/chrome/browser/net/client_hints.cc b/chrome/browser/net/client_hints.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..553d93d44e7c3b181ba5b4fba8f39c2057443329 |
--- /dev/null |
+++ b/chrome/browser/net/client_hints.cc |
@@ -0,0 +1,44 @@ |
+// Copyright (c) 2012 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/net/client_hints.h" |
+ |
+#include "base/stringprintf.h" |
+#include "content/public/browser/browser_thread.h" |
+#include "ui/gfx/screen.h" |
+ |
+using content::BrowserThread; |
+ |
+ClientHints::ClientHints() : screen_hints_("") { |
+} |
+ |
+ClientHints::~ClientHints() { |
+} |
+ |
+bool ClientHints::RetrieveScreenInfo() { |
+ DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); |
+ return BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, |
+ base::Bind(&ClientHints::FetchScreenInfoOnUIThread, this)); |
Ryan Sleevi
2013/02/08 22:12:53
For example:
namespace {
typedef base::Callback<v
bengr
2013/02/26 01:57:20
I couldn't get your suggestion to compile. I wound
|
+} |
+ |
+std::string ClientHints::GetScreenInfoHints() { |
+ return screen_hints_; |
+} |
+ |
+void ClientHints::FetchScreenInfoOnUIThread() { |
+ DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
+ gfx::Display display = gfx::Screen::GetNativeScreen()->GetPrimaryDisplay(); |
+ BrowserThread::PostTask(BrowserThread::IO, FROM_HERE, |
+ base::Bind(&ClientHints::UpdateScreenInfo, this, |
+ display.GetSizeInPixel().width(), |
+ display.GetSizeInPixel().height(), |
+ display.device_scale_factor())); |
+} |
+ |
+void ClientHints::UpdateScreenInfo(int width, int height, |
+ float device_pixel_ratio) { |
+ screen_hints_ = base::StringPrintf("dh=%d, dw=%d, dpr=%0.3g", |
+ height, width, device_pixel_ratio); |
+} |
+ |