Revert of content: Delete some now-dead event related code. (patchset #2 id:20001 of https://codereview.chromium.org/1052063002/)

Reason for revert:
Breaking cros waterfalls.
e.g.
http://build.chromium.org/p/chromiumos.chromium/builders/Daisy%20%28chromium%29

chromeos-chrome-43.0.2356.0_alpha-r1: ../../../../../../../home/chrome-bot/chrome_root/src/content/browser/renderer_host/render_widget_host_view_aura.cc: In member function 'virtual void content::RenderWidgetHostViewAura::OnGestureEvent(ui::GestureEvent*)':
chromeos-chrome-43.0.2356.0_alpha-r1: ../../../../../../../home/chrome-bot/chrome_root/src/content/browser/renderer_host/render_widget_host_view_aura.cc:2122:27: error: variable 'delegate' set but not used [-Werror=unused-but-set-variable]
chromeos-chrome-43.0.2356.0_alpha-r1:    RenderViewHostDelegate* delegate = NULL;
chromeos-chrome-43.0.2356.0_alpha-r1:                            ^

Original issue's description:
> content: Delete some now-dead event related code.
>
> Some of the removed methods were never used, and the rest had no
> real implementations.
>
> BUG=None
> R=jam@chromium.org
>
> Committed: https://chromium.googlesource.com/chromium/src/+/3b4f45c0f82a245b6ae1da2492f75e0cef3c2301

TBR=jam@chromium.org,sadrul@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=None

Review URL: https://codereview.chromium.org/1053063002

Cr-Commit-Position: refs/heads/master@{#323539}

2 files changed, 24 insertions, 0 deletions

diff --git a/content/public/browser/web_contents_delegate.cc b/content/public/browser/web_contents_delegate.cc
index 0e48d7c..461927c 100644
--- a/content/public/browser/web_contents_delegate.cc
+++ b/content/public/browser/web_contents_delegate.cc
@@ -67,6 +67,10 @@ bool WebContentsDelegate::TakeFocus(WebContents* source, bool reverse) {
   return false;
 }
 
+int WebContentsDelegate::GetExtraRenderViewHeight() const {
+  return 0;
+}
+
 void WebContentsDelegate::CanDownload(
     RenderViewHost* render_view_host,
     const GURL& url,
diff --git a/content/public/browser/web_contents_delegate.h b/content/public/browser/web_contents_delegate.h
index 1367f0b..d88b27c 100644
--- a/content/public/browser/web_contents_delegate.h
+++ b/content/public/browser/web_contents_delegate.h
@@ -56,6 +56,8 @@ class Size;
 
 namespace blink {
 class WebGestureEvent;
+class WebLayer;
+struct WebWindowFeatures;
 }
 
 namespace content {
@@ -233,6 +235,11 @@ class CONTENT_EXPORT WebContentsDelegate {
                            const std::string& request_method,
                            const base::Callback<void(bool)>& callback);
 
+  // Return much extra vertical space should be allotted to the
+  // render view widget during various animations (e.g. infobar closing).
+  // This is used to make painting look smoother.
+  virtual int GetExtraRenderViewHeight() const;
+
   // Returns true if the context menu operation was handled by the delegate.
   virtual bool HandleContextMenu(const content::ContextMenuParams& params);
 
@@ -258,6 +265,13 @@ class CONTENT_EXPORT WebContentsDelegate {
   virtual void HandleKeyboardEvent(WebContents* source,
                                    const NativeWebKeyboardEvent& event) {}
 
+  virtual void HandleMouseDown() {}
+  virtual void HandleMouseUp() {}
+
+  // Handles activation resulting from a pointer event (e.g. when mouse is
+  // pressed, or a touch-gesture begins).
+  virtual void HandlePointerActivate() {}
+
   // Allows delegates to handle gesture events before sending to the renderer.
   // Returns true if the |event| was handled and thus shouldn't be processed
   // by the renderer's event handler. Note that the touch events that create
@@ -267,6 +281,9 @@ class CONTENT_EXPORT WebContentsDelegate {
       WebContents* source,
       const blink::WebGestureEvent& event);
 
+  virtual void HandleGestureBegin() {}
+  virtual void HandleGestureEnd() {}
+
   // Called when an external drag event enters the web contents window. Return
   // true to allow dragging and dropping on the web contents window or false to
   // cancel the operation. This method is used by Chromium Embedded Framework.
@@ -274,6 +291,9 @@ class CONTENT_EXPORT WebContentsDelegate {
                             const DropData& data,
                             blink::WebDragOperationsMask operations_allowed);
 
+  // Render view drag n drop ended.
+  virtual void DragEnded() {}
+
   // Shows the repost form confirmation dialog box.
   virtual void ShowRepostFormWarningDialog(WebContents* source) {}