Add Vector2d classes that represent offsets, instead of using Point.

Previously Point served two purposes, to be a position in 2d space, and also
an offset from the origin. This introduces a Vector2d class to represent an
offset, allowing typesafety checks for geometric operations.

The following are now the case:

Point +/- Vector = Point
- A point plus/minus an offset gives you a point at a position offset by the
vector.

Vector +/- Vector = Vector
- Two offsets can be added together to make a new offset.

Point - Point = Vector
- Subtracting one point from another gives you the offset between the two
points.

We add some new methods to perform these operations:

Rect::OffsetFromOrigin() gives the offset between the position of the rect
and the origin.

Point::OffsetFromOrigin() gives the offset between the point and the origin.

PointAtOffsetFromOrigin(Vector2d) converts a Vector2d to a Point at the given
offset away from the origin.

Rect::Offset(), Point::Add(), and Point::Subtract() now receive a Vector2d
instead of a point.

BUG=147395
R=sky

Review URL: https://codereview.chromium.org/11269022

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@165198 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 2 insertions, 2 deletions

diff --git a/content/browser/renderer_host/test_render_view_host.h b/content/browser/renderer_host/test_render_view_host.h
index baddd15..f8b72b72 100644
--- a/content/browser/renderer_host/test_render_view_host.h
+++ b/content/browser/renderer_host/test_render_view_host.h
@@ -88,7 +88,7 @@ class TestRenderWidgetHostView : public RenderWidgetHostViewBase {
   virtual void WasShown() OVERRIDE {}
   virtual void WasHidden() OVERRIDE {}
   virtual void MovePluginWindows(
-      const gfx::Point& scroll_offset,
+      const gfx::Vector2d& scroll_offset,
       const std::vector<webkit::npapi::WebPluginGeometry>& moves) OVERRIDE {}
   virtual void Focus() OVERRIDE {}
   virtual void Blur() OVERRIDE {}
@@ -145,7 +145,7 @@ class TestRenderWidgetHostView : public RenderWidgetHostViewBase {
   virtual void SetCachedBackgroundColor(SkColor color) OVERRIDE {}
   virtual void SetCachedPageScaleFactorLimits(float minimum_scale,
                                               float maximum_scale) OVERRIDE {}
-  virtual void UpdateFrameInfo(const gfx::Point& scroll_offset,
+  virtual void UpdateFrameInfo(const gfx::Vector2d& scroll_offset,
                                float page_scale_factor,
                                const gfx::Size& content_size) OVERRIDE {}
   virtual void HasTouchEventHandlers(bool need_touch_events) OVERRIDE {}