Remove page IDs from three WebContentsObserver APIs that don't need it.

content/browser/web_contents/aura/overscroll_navigation_overlay_unittest.cc

 // 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 "content/browser/web_contents/aura/overscroll_navigation_overlay.h"
 
 #include "content/browser/frame_host/navigation_entry_impl.h"
 #include "content/browser/web_contents/aura/image_window_delegate.h"
 #include "content/browser/web_contents/web_contents_view.h"
 #include "content/common/view_messages.h"
@@ skipping 27 matching lines @@
     std::vector<unsigned char> png_data;
     gfx::PNGCodec::EncodeBGRASkBitmap(bitmap, true, &png_data);
     scoped_refptr<base::RefCountedBytes> png_bytes =
         base::RefCountedBytes::TakeVector(&png_data);
     NavigationEntryImpl* entry_impl =
         NavigationEntryImpl::FromNavigationEntry(entry);
     entry_impl->SetScreenshotPNGData(png_bytes);
   }
 
   void ReceivePaintUpdate() {
-    ViewHostMsg_DidFirstVisuallyNonEmptyPaint msg(
-        test_rvh()->GetRoutingID(), 0);
+    ViewHostMsg_DidFirstVisuallyNonEmptyPaint msg(test_rvh()->GetRoutingID());
     RenderViewHostTester::TestOnMessageReceived(test_rvh(), msg);
   }
 
   void PerformBackNavigationViaSliderCallbacks() {
     // Sets slide direction to SLIDE_BACK, sets screenshot from NavEntry at
     // offset -1  on layer_delegate_.
     delete GetOverlay()->CreateBackLayer();
     // Performs BACK navigation, sets image from layer_delegate_ on
     // image_delegate_.
     GetOverlay()->OnWindowSlideCompleting();
@@ skipping 156 matching lines @@
   // Navigation was committed and the load update was received - the flag
   // should now be updated.
   EXPECT_TRUE(GetOverlay()->loading_complete_);
 
   EXPECT_TRUE(GetOverlay()->web_contents());
   ReceivePaintUpdate();
   EXPECT_FALSE(GetOverlay()->web_contents());
 }
 
 }  // namespace content