Introduce content::RenderWidgetHostViewPort (in content/port/browser).

chrome/browser/tab_contents/thumbnail_generator_unittest.cc

 // 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 "base/basictypes.h"
 #include "base/stringprintf.h"
 #include "chrome/browser/history/top_sites.h"
 #include "chrome/browser/tab_contents/thumbnail_generator.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/test/base/testing_profile.h"
@@ skipping 22 matching lines @@
 // transport_dib_win.cc(71)] Check failed: !memory(). Mapped file twice in
 // the same process.
 //
 #if !defined(OS_MACOSX) && !defined(OS_WIN)
 
 // This test render widget host view uses BackingStoreSkia instead of
 // TestBackingStore, so that basic operations like CopyFromBackingStore()
 // works. The skia implementation doesn't have any hardware or system
 // dependencies.
 class TestRenderWidgetHostViewWithBackingStoreSkia
-    : public TestRenderWidgetHostView {
+    : public content::TestRenderWidgetHostView {
  public:
   explicit TestRenderWidgetHostViewWithBackingStoreSkia(RenderWidgetHost* rwh)
-      : TestRenderWidgetHostView(rwh), rwh_(rwh) {}
+      : content::TestRenderWidgetHostView(rwh), rwh_(rwh) {}
 
   BackingStore* AllocBackingStore(const gfx::Size& size) {
     return new BackingStoreSkia(rwh_, size);
   }
 
  private:
   RenderWidgetHost* rwh_;
   DISALLOW_COPY_AND_ASSIGN(TestRenderWidgetHostViewWithBackingStoreSkia);
 };
 
@@ skipping 340 matching lines @@
   good_score.good_clipping = true;
   good_score.boring_score = 0.0;
   good_score.load_completed = true;
   top_sites->AddKnownURL(kGoodURL, good_score);
 
   // Should be false, as the existing thumbnail is good enough (i.e. don't
   // need to replace the existing thumbnail which is new and good).
   EXPECT_FALSE(ThumbnailGenerator::ShouldUpdateThumbnail(
       &profile, top_sites.get(), kGoodURL));
 }