Migrates battery_status from content/renderer/ to WebKit/platform/

third_party/WebKit/Source/platform/base/Bind.h

 // 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 "core/css/cssom/ScaleTransformComponent.h"
+#ifndef Bind_h
+#define Bind_h

[haraken, 2016/02/15 13:18:39]

(Nit: I'm not really happy that Blink's threading primitives are scattered in
many files in wtf/ and platform/, but this would be out of the scope of this CL.
I'm fine with the Bind.h in this CL.)

[Yuki, 2016/02/16 07:31:58]

Acknowledged.

 
-#include "core/css/CSSPrimitiveValue.h"
-#include "core/css/CSSValuePool.h"
+#include "base/bind.h"
+#include "mojo/public/cpp/bindings/callback.h"
+
+// This file provides limited access to base::Bind() function. base::Bind()
+// could be dangerous if it's used across threads, so we don't want to allow
+// general use of base::Bind().
+// See also "platform/ThreadSafeFunctional.h".
 
 namespace blink {
 
-PassRefPtrWillBeRawPtr<CSSFunctionValue> ScaleTransformComponent::toCSSValue() const
+// Binds an instance of a class to its member function. Does not bind anything
+// else.
+template<typename Class, typename ReturnType, typename... Args>
+mojo::Callback<ReturnType(Args...)>
+bindInstanceToMethodForMojo(ReturnType (Class::*method)(Args...), Class* instance)

[haraken, 2016/02/15 13:18:39]

sameThreadBindForMojo ? (Assuming that tzik@ is introducing
sameThreadBind/crossThreadBind.)

[Yuki, 2016/02/16 07:31:58]

Done.

 {
-    RefPtrWillBeRawPtr<CSSFunctionValue> result = CSSFunctionValue::create(m_is2D ? CSSValueScale : CSSValueScale3d);
-
-    result->append(cssValuePool().createValue(m_x, CSSPrimitiveValue::UnitType::Number));
-    result->append(cssValuePool().createValue(m_y, CSSPrimitiveValue::UnitType::Number));
-    if (!m_is2D)
-        result->append(cssValuePool().createValue(m_z, CSSPrimitiveValue::UnitType::Number));
-
-    return result.release();
+    return base::Bind(method, base::Unretained(instance));
 }
 
 } // namespace blink
+
+#endif // Bind_h