Remove GrIsPow2 in favor of SkIsPow2.

Looks like there is no good reason to have two copies of this function
doing the same thing with different name.

BUG=None
TEST=make tests
R=bsalomon@google.com

Author: tfarina@chromium.org

Review URL: https://codereview.chromium.org/318873002

include/gpu/GrColor.h

@@ -106,7 +106,7 @@ enum GrColorComponentFlags {
 };
 
 static inline char GrColorComponentFlagToChar(GrColorComponentFlags component) {
-    SkASSERT(GrIsPow2(component));
+    SkASSERT(SkIsPow2(component));
     switch (component) {
         case kR_GrColorComponentFlag:
             return 'r';

include/gpu/GrTexture.h

@@ -47,11 +47,11 @@ public:
      * new callsites for these functions. They are slated for removal.
      */
     SkFixed normalizeFixedX(SkFixed x) const {
-        SkASSERT(GrIsPow2(fDesc.fWidth));
+        SkASSERT(SkIsPow2(fDesc.fWidth));
         return x >> fShiftFixedX;
     }
     SkFixed normalizeFixedY(SkFixed y) const {
-        SkASSERT(GrIsPow2(fDesc.fHeight));
+        SkASSERT(SkIsPow2(fDesc.fHeight));
         return y >> fShiftFixedY;
     }
 

include/gpu/GrTypes.h

@@ -150,13 +150,6 @@ static inline size_t GrSizeAlignDown(size_t x, uint32_t alignment) {
 
 ///////////////////////////////////////////////////////////////////////////////
 
-/**
- *  Return true if n is a power of 2
- */
-static inline bool GrIsPow2(unsigned n) {
-    return n && 0 == (n & (n - 1));
-}
-
 /**
  *  Return the next power of 2 >= n.
  */

src/gpu/GrContext.cpp

@@ -618,7 +618,7 @@ bool GrContext::supportsIndex8PixelConfig(const GrTextureParams* params,
         return false;
     }
 
-    bool isPow2 = GrIsPow2(width) && GrIsPow2(height);
+    bool isPow2 = SkIsPow2(width) && SkIsPow2(height);
 
     if (!isPow2) {
         bool tiled = NULL != params && params->isTiled();

src/gpu/GrGpu.cpp

@@ -125,10 +125,10 @@ GrTexture* GrGpu::createTexture(const GrTextureDesc& desc,
         SkASSERT((desc.fFlags & kRenderTarget_GrTextureFlagBit) == 0);
 
         if (!this->caps()->npotTextureTileSupport() &&
-            (!GrIsPow2(desc.fWidth) || !GrIsPow2(desc.fHeight))) {
+            (!SkIsPow2(desc.fWidth) || !SkIsPow2(desc.fHeight))) {
             return NULL;
         }
-        
+
         this->handleDirtyContext();
         tex = this->onCreateCompressedTexture(desc, srcData);
     } else {

src/gpu/GrTexture.cpp

@@ -172,7 +172,7 @@ GrResourceKey::ResourceFlags get_texture_flags(const GrGpu* gpu,
     GrResourceKey::ResourceFlags flags = 0;
     bool tiled = NULL != params && params->isTiled();
     if (tiled && !gpu->caps()->npotTextureTileSupport()) {
-        if (!GrIsPow2(desc.fWidth) || !GrIsPow2(desc.fHeight)) {
+        if (!SkIsPow2(desc.fWidth) || !SkIsPow2(desc.fHeight)) {
             flags |= kStretchToPOT_TextureFlag;
             switch(params->filterMode()) {
                 case GrTextureParams::kNone_FilterMode: