GTK: unify the bookmark dragging icon generation code into bookmark utils.

this also has the effect of standardizing the appearance of boomkark drags. On compositing window managers, the drag widget will have no background.

BUG=42147
TEST=manual

Review URL: http://codereview.chromium.org/1780016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@46153 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 20 insertions, 6 deletions

diff --git a/gfx/point.h b/gfx/point.h
index 6e2cfe7..b3bb37b 100644
--- a/gfx/point.h
+++ b/gfx/point.h
@@ -52,6 +52,18 @@ class Point {
     y_ += delta_y;
   }
 
+  Point Add(const Point& other) {
+    Point copy = *this;
+    copy.Offset(other.x_, other.y_);
+    return copy;
+  }
+
+  Point Subtract(const Point& other) {
+    Point copy = *this;
+    copy.Offset(-other.x_, -other.y_);
+    return copy;
+  }
+
   bool operator==(const Point& rhs) const {
     return x_ == rhs.x_ && y_ == rhs.y_;
   }
diff --git a/gfx/rect.cc b/gfx/rect.cc
index 30338f4..dd8f392 100644
--- a/gfx/rect.cc
+++ b/gfx/rect.cc
@@ -35,15 +35,16 @@ namespace gfx {
 Rect::Rect() {
 }
 
-Rect::Rect(int width, int height) {
-  set_width(width);
-  set_height(height);
+Rect::Rect(int width, int height)
+    : size_(width, height) {
 }
 
 Rect::Rect(int x, int y, int width, int height)
-    : origin_(x, y) {
-  set_width(width);
-  set_height(height);
+    : origin_(x, y), size_(width, height) {
+}
+
+Rect::Rect(const gfx::Size& size)
+    : size_(size) {
 }
 
 Rect::Rect(const gfx::Point& origin, const gfx::Size& size)
diff --git a/gfx/rect.h b/gfx/rect.h
index 4a217c2..1c83f48 100644
--- a/gfx/rect.h
+++ b/gfx/rect.h
@@ -37,6 +37,7 @@ class Rect {
 #elif defined(USE_X11)
   explicit Rect(const GdkRectangle& r);
 #endif
+  Rect(const gfx::Size& size);
   Rect(const gfx::Point& origin, const gfx::Size& size);
 
   ~Rect() {}