Use expected main frame size from WebViewImpl when creating a new FrameView.

Source/web/tests/PinchViewportTest.cpp

 // Copyright 2014 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 "config.h"
 
 #include "core/frame/PinchViewport.h"
 
 #include "core/frame/FrameHost.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 1191 matching lines @@
     FrameView& frameView = *webViewImpl()->mainFrameImpl()->frameView();
     frameView.setScrollPosition(IntPoint(0, 10000));
     EXPECT_EQ(500, frameView.scrollPositionDouble().y());
 
     // Now send the resize, make sure the scroll offset doesn't change.
     webViewImpl()->setTopControlsLayoutHeight(0);
     webViewImpl()->resize(IntSize(1000, 1500));
     EXPECT_EQ(500, frameView.scrollPositionDouble().y());
 }
 
+// Tests that when a new frame is created, it is created with the intended
+// size (i.e. the contentWidth).
+TEST_F(PinchViewportTest, TestMainFrameInitializationSizing)
+{
+    initializeWithAndroidSettings();
+
+    webViewImpl()->setPageScaleFactorLimits(0.5, 2.0);
+    webViewImpl()->resize(IntSize(100, 200));
+
+    registerMockedHttpURLLoad("content-width-1000.html");
+    navigateTo(m_baseURL + "content-width-1000.html");
+
+    WebLocalFrameImpl* localFrame = webViewImpl()->mainFrameImpl();
+    FrameView& frameView = *localFrame->frameView();
+    localFrame->createFrameView();
+
+    EXPECT_SIZE_EQ(IntSize(200, 400), frameView.frameRect().size());
+}
 
 } // namespace