Bug 1240708 - Various trivial coverity warning fixes (part 2). r=kats

gfx/gl/GLContext.cpp

@@ -418,11 +418,14 @@ GLContext::GLContext(const SurfaceCaps& caps,
     mMaxCubeMapTextureSize(0),
     mMaxTextureImageSize(0),
     mMaxRenderbufferSize(0),
+    mMaxSamples(0),
     mNeedsTextureSizeChecks(false),
     mNeedsFlushBeforeDeleteFB(false),
     mWorkAroundDriverBugs(true),
     mHeavyGLCallsSinceLastFlush(false)
 {
+    mMaxViewportDims[0] = 0;
+    mMaxViewportDims[1] = 0;
     mOwningThreadId = PlatformThread::CurrentId();
 }
 
@@ -1739,7 +1742,6 @@ GLContext::InitWithPrefix(const char *prefix, bool trygl)
 
         mMaxTextureImageSize = mMaxTextureSize;
 
-        mMaxSamples = 0;
         if (IsSupported(GLFeature::framebuffer_multisample)) {
             fGetIntegerv(LOCAL_GL_MAX_SAMPLES, (GLint*)&mMaxSamples);
         }

gfx/gl/GLContext.h

@@ -341,7 +341,6 @@ public:
 protected:
     bool mInitialized;
     bool mIsOffscreen;
-    bool mIsGlobalSharedContext;
     bool mContextLost;
 
     /**

gfx/gl/GLLibraryEGL.cpp

@@ -8,6 +8,7 @@
 #include "gfxUtils.h"
 #include "mozilla/Preferences.h"
 #include "mozilla/Assertions.h"
+#include "mozilla/unused.h"
 #include "nsDirectoryServiceDefs.h"
 #include "nsDirectoryServiceUtils.h"
 #include "nsIGfxInfo.h"
@@ -306,8 +307,8 @@ GLLibraryEGL::EnsureInitialized(bool forceAccel)
     };
 
     // Do not warn about the failure to load this - see bug 1092191
-    GLLibraryLoader::LoadSymbols(mEGLLibrary, &optionalSymbols[0], nullptr, nullptr,
-                                 false);
+    Unused << GLLibraryLoader::LoadSymbols(mEGLLibrary, &optionalSymbols[0],
+                                           nullptr, nullptr, false);
 
 #if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION >= 18
     MOZ_RELEASE_ASSERT(mSymbols.fQueryStringImplementationANDROID,

gfx/gl/GLLibraryLoader.cpp

@@ -95,8 +95,9 @@ GLLibraryLoader::LoadSymbols(PRLibrary *lib,
         }
 
         if (*ss->symPointer == 0) {
-            if (warnOnFailure)
+            if (warnOnFailure) {
                 printf_stderr("Can't find symbol '%s'.\n", ss->symNames[0]);
+            }
 
             failCount++;
         }

gfx/gl/GLTextureImage.cpp

@@ -270,6 +270,7 @@ TextureImage::TextureImage(const gfx::IntSize& aSize,
     : mSize(aSize)
     , mWrapMode(aWrapMode)
     , mContentType(aContentType)
+    , mTextureFormat(gfx::SurfaceFormat::UNKNOWN)
     , mFilter(Filter::GOOD)
     , mFlags(aFlags)
 {}
@@ -313,6 +314,7 @@ TiledTextureImage::TiledTextureImage(GLContext* aGL,
     : TextureImage(aSize, LOCAL_GL_CLAMP_TO_EDGE, aContentType, aFlags)
     , mCurrentImage(0)
     , mIterationCallback(nullptr)
+    , mIterationCallbackData(nullptr)
     , mInUpdate(false)
     , mRows(0)
     , mColumns(0)