Reduce window rectangles cap to 8

src/gpu/gl/GrGLGpu.cpp

Index: src/gpu/gl/GrGLGpu.cpp
diff --git a/src/gpu/gl/GrGLGpu.cpp b/src/gpu/gl/GrGLGpu.cpp
index 3e44138328d884a36bfbad1e1820f3e0d6fa8aa4..ad19c9457a37775509a2ce3ac354f647906921f5 100644
--- a/src/gpu/gl/GrGLGpu.cpp
+++ b/src/gpu/gl/GrGLGpu.cpp
@@ -1996,6 +1996,13 @@ void GrGLGpu::flushScissor(const GrScissorState& scissorState,
     this->disableScissor();
 }
 
+// Blah blah blah.

[bsalomon, 2016/08/22 13:21:57]

I like this better.

[csmartdalton, 2016/08/22 14:10:39]

This one doesn't seem to work.. The pragma needs to appear before GrGLIRect.h
gets included, but if we do that first it breaks a commit hook that likes the
includes to be first.

We might be able to sneak a couple includes before the pragma though, and then
do it before including GrGLIRect.h 

+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=5912
+#define HAS_GCC_BUG defined(__GNUC__) && (__GNUC__ < 5) && !defined(__clang__)
+#if HAS_GCC_BUG
+#  pragma GCC diagnostic ignored "-Warray-bounds"
+#endif
+
 void GrGLGpu::flushWindowRectangles(const GrWindowRectangles& windows, const GrGLRenderTarget* rt) {
     typedef GrWindowRectangles::Mode Mode;
     SkASSERT(windows.count() <= this->caps()->maxWindowRectangles());
@@ -2019,6 +2026,10 @@ void GrGLGpu::flushWindowRectangles(const GrWindowRectangles& windows, const GrG
     fHWWindowRects.set(rt->origin(), rt->getViewport(), windows);
 }
 
+#if HAS_GCC_BUG
+#  pragma GCC diagnostic error "-Warray-bounds"
+#endif
+
 void GrGLGpu::disableWindowRectangles() {
     if (!this->caps()->maxWindowRectangles() || fHWWindowRects.disabled()) {
         return;