[Omnibox] Move result view layouts into sub-views

This CL moves pieces of the OmniboxResultView Layout into the sub-views
(OmniboxSuggestionView elements). The OmniboxSuggestionView now have
functions to layout each style of result: Answer, Entity, TwoLine, and
Split. This CL is part of a refactor of the OmniboxResultView.

Bug: None
Change-Id: I8cd07a4749ab68238956632b45c2bd575fb4dccc
Reviewed-on: https://chromium-review.googlesource.com/1013320Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Commit-Queue: Dave Schuyler <dschuyler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551475}

chrome/browser/ui/views/omnibox/omnibox_result_view.h

@@ -32,7 +32,6 @@ class Image;
 }
 
 class OmniboxImageView;
-class OmniboxSeparatedLineView;
 class OmniboxSuggestionView;
 class OmniboxTabSwitchButton;
 class OmniboxTextView;
@@ -95,12 +94,6 @@ class OmniboxResultView : public views::View,
 
   gfx::Image GetIcon() const;
 
-  // Returns the height of the the description section of answer suggestions.
-  int GetAnswerHeight() const;
-
-  // Returns the margin that should appear at the top and bottom of the result.
-  int GetVerticalMargin() const;
-
   // Sets the hovered state of this result.
   void SetHovered(bool hovered);
 
@@ -136,7 +129,7 @@ class OmniboxResultView : public views::View,
 
   // Weak pointers for easy reference.
   OmniboxSuggestionView* suggestion_view_;  // The leading (or left) view.
-  OmniboxSeparatedLineView* keyword_view_;  // The trailing (or right) view.
+  OmniboxSuggestionView* keyword_view_;     // The trailing (or right) view.
   std::unique_ptr<OmniboxTabSwitchButton> suggestion_tab_switch_button_;
 
   DISALLOW_COPY_AND_ASSIGN(OmniboxResultView);