[Contextual Search] Fixing pixel gaps in Search Panel.

chrome/browser/android/compositor/layer/contextual_search_layer.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 "chrome/browser/android/compositor/layer/contextual_search_layer.h"
 
 #include "cc/layers/layer.h"
 #include "cc/layers/nine_patch_layer.h"
 #include "cc/layers/solid_color_layer.h"
 #include "cc/layers/ui_resource_layer.h"
@@ skipping 54 matching lines @@
       resource_manager_->GetResource(ui::ANDROID_RESOURCE_TYPE_STATIC,
                                      search_provider_icon_resource_id);
   ui::ResourceManager::Resource* search_icon_resource =
       resource_manager_->GetResource(ui::ANDROID_RESOURCE_TYPE_STATIC,
                                      search_icon_resource_id);
 
   DCHECK(search_bar_background_resource);
   DCHECK(search_provider_icon_resource);
   DCHECK(search_icon_resource);
 
+  // Round values to avoid pixel gap between layers.
+  search_bar_height = floor(search_bar_height);
+  search_bar_margin_top = floor(search_bar_margin_top);
+
   // ---------------------------------------------------------------------------
   // Search Bar Background
   // ---------------------------------------------------------------------------
   gfx::Size background_size(search_panel_width, search_bar_height);
   search_bar_background_->SetUIResourceId(
       search_bar_background_resource->ui_resource->id());
   search_bar_background_->SetBorder(
       search_bar_background_resource->Border(background_size));
   search_bar_background_->SetAperture(search_bar_background_resource->aperture);
   search_bar_background_->SetBounds(background_size);
@@ skipping 177 matching lines @@
 
 ContextualSearchLayer::~ContextualSearchLayer() {
 }
 
 scoped_refptr<cc::Layer> ContextualSearchLayer::layer() {
   return layer_;
 }
 
 }  //  namespace android
 }  //  namespace chrome