Add Sample slide for Rectanizers

src/gpu/GrRectanizer_pow2.cpp

Index: src/gpu/GrRectanizer_pow2.cpp
diff --git a/src/gpu/GrRectanizer_pow2.cpp b/src/gpu/GrRectanizer_pow2.cpp
index d92e80c2d55bb2a6167a7f734ccf360a191b724f..5da7e04528ede7934e9b79962e348a24e2390631 100644
--- a/src/gpu/GrRectanizer_pow2.cpp
+++ b/src/gpu/GrRectanizer_pow2.cpp
@@ -7,7 +7,6 @@
  */
 
 #include "GrRectanizer_pow2.h"
-#include "GrTBSearch.h"
 
 bool GrRectanizerPow2::addRect(int width, int height, GrIPoint16* loc) {
     if ((unsigned)width > (unsigned)this->width() ||
@@ -15,13 +14,8 @@ bool GrRectanizerPow2::addRect(int width, int height, GrIPoint16* loc) {
         return false;
     }
 
-    int32_t area = width * height;
+    int32_t area = width * height; // computed here since height will be modified
 
-    /*

[jvanverth1, 2014/05/30 18:03:02]

Why did you remove this comment?

[robertphillips, 2014/05/30 18:19:27]

This approach doesn't use binary search. Also there cannot be more than one row
with the same height.

-        We use bsearch, but there may be more than one row with the same height,
-        so we actually search for height-1, which can only be a pow2 itself if
-        height == 2. Thus we set a minimum height.
-     */
     height = GrNextPow2(height);
     if (height < kMIN_HEIGHT_POW2) {
         height = kMIN_HEIGHT_POW2;